you'll need a heat gun
a friend of mine i put on to these complained the wire was melting before the heat shrink shrunk
he had heat gun on full blow and in one spot for too long... take it easy

Ok ...yep got one of those...

...will take it careful, maybe practice on the D*lly first, that doesnt matter!!!!!

As for driving in the sea....I am only 6 miles from Beachy Head...if this car doesnt shape up soon I will drag it there on the back of my space hopper and chuck it over the edge ....then we will see if it likes being in the sea

haha
im sure youll be fine, but just saying incase you get excited and panic and burn a wire