Sorry to hear about the condition of your hands.
I wonder if you would consider using these:
https://www.parts-express.com/5-16-Spade-Terminal-with-Dual-Set-Screws-and-Poly-Carbonate-091-3606?quantity=1
Remove existing connector, strip wire, twist wire, insert wire, tighten 2 hex head set screws, done. no heat shrink required, removable/reusable, color coded
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I’d be glad to do it for you, no charge, I am in Plainfield, NJ.
Timing: I’m having Back Surgery (laminectomy) on Tuesday, then short recovery. Send me a private message if interested.
Elliott