Hi I have a 1970 60hp Johnson (60ESL 70B) I'm trying to revive. The primary lead wire from the base plate to the Amplifier is frayed badly above the connector. Please see attached photos. This is one of the two wires part of the "Primary Lead Assembly" for this engine. The part doesn't appear to be available. Can anyone suggest a repair? I was thinking of soldering it all together or maybe wrapping another wire around it and solder that? Thanks