The proper way to connect a second starter wire depends with the configuration used.
If wired correctly the red wire will be hot, but any wire can be hot regardless of colour if done incorrectly.
You can hot wire a boat. It just matters what type it is.
In electrical wiring, the live or "hot" wire is typically brown or red, the neutral wire is typically blue or black, and the ground wire is yellow or green. So, in this case, the brown wire is likely the hot wire, the blue wire is the neutral wire, and the yellow green wire is the ground wire.
You have a 3 way switch. Your black wire is the hot wire. Your green wire is the ground wire. Your red and white wires go to the light and other switch. You should have gotten a wiring diagram with your switch.
the hot wire goes to the starter and the ground wire bolts to the engine block.
Jumper wire from Battery + to Coil+Jump starter solenoid from smaller trigger terminal to starter side
Take a jumper wire from Battery + to coil +Then jump solenoid on starter
Run a toggle switch from battery to ign. side of ign. switch.
wire direct from + side battery to + side coil and jump starter solenoid
A wire that is getting hot could be shorted to ground.
Follow the "red" hot wire from the battery and u always find the starter.
If the red wire is a smaller wire to the starter motor, then its a faulty ignition switch. If its the large wire to the starter, then its meant to be live all the time. hope this helps
Check starter hot wire with test light. If hot & won't turn, there you go.
I've never wired a harley starter but I've wired most everything else and they have been pretty much the same. You will have a large lug on the solenoid for the positive battery connection. There will also be a small connection for the start signal from the ignition switch. It is hot only when the switch is in the start position. There may or may not be a ground connection. I've seen it either way. If it fails to start, ground the starter case to the frame. That should pretty much do it.
Its located on the outside of the wheel well, behind the oil bag... a wire runs from your starter directly to the relay, which is a small inch squared black box.
Remove the starter. the solenoid is mounted on the starter.