I recently had to use a Home Depot tinned copper open end ring terminal on 8 awg tinned marine cable.
After crimping with a hydraulic crimper, I soldered the open end shut, dremelled it smooth, and covered the exposed copper with more solder. I then fed solder into the other end, amazingly without melting the insulation. After cleaning off all the flux, I heat shrinked it.
The wire remained flexible right upto the ring terminal. It was sealed with solder, and then heat shrinked.
I like overkill. But now I own closed end ring terminals and nice thick adhesive lined heatshrink, and might redo the whole dang thing.
Well, I would if it were not for just a 18 amp blower motor.