If it were mine I'd solder in a new piece of wire and heat shrink wrap it. I'd also put something along the sharp edge, a bit of split tube etc. Connectors can fail and let water in, the less the better.
If your local guy has already said he can do it why not let him? Probably cheaper than your fuel and easier than faffing about with the dealer.
Agree Steve, that's my plan
Thanks again for all the advice on TM
