This is for my new to me 1965 Plus 4 four seater. I seem to have some loose wires particularly behind the cluster assembly. The water temperature gauge was not working but some wiggling of the wires behind it re-activated it. But then the horn went out. As I'm new to this I'd like to pick your brains if you've dealt with this. I'm going to assume the best thing to do is going to be to lie on my back with good strong lights and check everything as opposed to taking the assembly out and risk disconnecting or breaking something.

Any tips are appreciated!