Perhaps this solution would be better to avoid confusion with the verb "to lead" (as in "leader")? Context would solve the ambiguity, but perhaps this would sound better, improve reading "flow".

Or, maybe, this has not much to do with lead; the most common usage for "chumbar" (although not very technical, I think) means a civil construction technique used to attach e.g. a sink to the floor/wall. In this case it involves mortar, I suppose. So maybe (this is a wild guess) this refers only to the anode attachment.

as in these examples:

Plating Anode Soldering - China - Suppliers of Plating Anode ...Find Plating Anode Soldering suppliers in China. Kellysearch has 9 companies listed for Plating Anode Soldering.
www.kellysearch.com/cn-product-125104.html - 26k - Cached - Similar pages
Anode soldering..Anode soldering.. A little blurry but here is a different angle of the soldering to the anode plate.. Date: 01/10/2000. Size:. 640x480, 1024x768, 1280x960 ...
www.caarc.ca/gallery/main.php?g2_view=dynamicalbum.RandomAl... - 8k - Cached - Similar pages
solder paste Exporters,solder paste Manufacturers,solder paste ...manufacturers of high purity solder sticks, solder wire, rosin cored, flux cored , tin and tin lead anode, soldering paste, water soluble flux, pcb cleaning ...
www.trademart.in/solder-paste/companies/search-exporters.ht... - 132k - Cached - Similar pages
Collimating light from an LED device - Patent 7230280The leadframe includes a cathode 220, an anode 222, a cathode soldering terminal 224, and an anode soldering terminal 226. A leadframe is typically a ...
www.freepatentsonline.com/7230280.html - Similar pages
by YC Yaw - 2007 - Related articles - All 4 versions
[PPT] Endcap Muon System - FNALFile Format: Microsoft Powerpoint - View as HTML
Panel Winding Spec # 5520-TR-XXXXXX; Wire gluing Spec # 5520-TR-XXXXXX; Anode Soldering Spec #5520-TR-333349; Panel Cleaning & Meas. Spec #5520-TR-XXXXXX ...
tdpc01.fnal.gov/uscmsemu/Presentations/CMS-EMU%20May%2099/DOE_May99.ppt - Similar pages
[PDF] TFMD5000File Format: PDF/Adobe Acrobat
Anode Soldering. Terminal. 1.1. 0.48. Cathode Soldering. Terminal. Encapsulation . 0.3. 4.4. 5.0. 2.15. ±. 0.2. 2.0. 4.0. Page 3. TFMD5000 ...
www.35compounds.com/tfmd_files/TFMD5000.pdf - Similar pages
Section V. PARTS LISTINGPlace anode soldering lug on SCR and screw makes contact with the case and to the case side of SCR into heat sink. the heat sink. b. ...
www.tpub.com/content/aviationandaccessories/TM-55-4920-401-... - 23k - Cached - Similar pages
BAS40-06LT1G Datasheet Pdf IC-ON-LINE电子技术资料中文网站ANODE SOLDERING FOOTPRINT* 0.95 0.037 0.95 0.037 2.0 0.079 0.9 0.035 SCALE 10:1 0.8 0.031 mm inches *For additional information on our Pb-Free strategy and ...
cn.ic-on-line.cn/iol_bas4006lt1g/pdfview/1217223.htm - 38k - Cached - Similar pages
(WO/2000/063664) A METHOD OF MEASURING PRESSURE BY MEANS OF A ...The covers 3a and 3b can be mounted on the package 2 by direct bonding or by anode soldering a thin layer of powdered glass. ...
www.wipo.int/pctdb/en/wo.jsp?IA=EP2000003095&DISPLAY=DESC - 29k - Cached - Similar pages
Method of measuring pressure by means of a pressure gauge having a ...by anode soldering a thin layer of powdered glass. The electronics essentially comprises an oscillator circuit 7 and a servo-control circuit 8 operating on ...
www.patentstorm.us/patents/6615664/description.html - Similar pages

http://www.babylon.com/definition/chumbar/
chumbar
v. plumb, plough, pluck; solder

http://www.caarc.ca/gallery/main.php?g2_view=dynamicalbum.Ra...
Anode soldering

http://www.homeimprovementpages.com.au/professional/70529
Anode Plumbing and maintenace

http://www.homeimprovementpages.com.au/building_renovating/q...
Bathroom Renovations Burleigh Waters
Anode Plumbing and maintenace

think so