I am having trouble getting my right engine to fire up, so I did some digging and found a black wire from the harness about 2 feet long not connected to anything.. There are already 2 blacks on my battery and one red.. Any ideas where it goes and if it may be my problem? When it fires up, everythings fine except the right died a couple times when hitting bumps.. Also after a few times of trying to start the right, I just get a click for both engines, but battery is fine.. I do not get any beeps to start but hear 2 clicks.. A couple times while trying to start the right it killed the left.. I've replaced plugs(right motor ones were covered in oil) and checked the 2 fuse banks.. Compression of 145 on all 3.. Battery cables tight.. The right motor sounds more clicky trying to start.. Any help would be greatly appreciated.