I did similar in my BJ73. I had it wired on permanent plus to have power when camping. Not a good idea!
All DC DC converters draw a permanent load. This caused my batteries frequently to drain down to 23.xV when the truck sat for a week. After 2 years I have weak batteries now.
Also those cheap...
Those sockets come loose when twisted 90°. (Bajonet). As it's plastic on plastic, it might seize. A drip WD40 may help.
I can't help your sausage fingers 😉
If some regular service being due and some burned bulbs are all issues the truck has: Congratulations. Very lucky.
Cheers Ralf
Hi
Welcome to the crew. Nice rig. Thank you for sharing the pics..
Go for GL4 in the Transfer. Some GL5 and GL4/5 multi purpose oils may contain additives that interfere with soft metal alloys, e.g of the synchron rings.
The last character of your axle code is 5, so you have a limited slip...