Made a quite stupid mistake few months ago. I was on the way to add an auxiliary button to start the engine rather than using the key, and I did cut the large BLACK/BLUE wire which goes out of the "key". Now I have this wire, and I don't know where it was connected as I cannot find the other part of the wire (not kidding !!).

Does anybody knows where goes that large BLACK/BLUE wire which goes out of the big plug just after the key ?

Thanks very much !