GI? Christ - you want to see under the caveman...
EVERY bulb holder has the earth braid soldered across/around the head of the mounting bolt... Gottlieb shit...mumble...piss....moan... 
Need to buy a de-soldering station just to clean the friggin' inserts! (I don't like the idea of bending them - took me about 6 hours to do every globe/insert on PZ)
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BTW: Where do you get the red condom things to go over a #44 globe? (For "red" GI lights on PZ) need about 5.
Earth braid soldered to the base is common on all the manufacturers of this era. Just take your time.
How about posting a resto thread - I'm keen to see the progress of your Caveman.
