Ground the black wire just to be on the safe side. If it is marked, be sure to put the battery on the correct side of solenoid. You should be able to take remaining wire from machine and hook it to wire on solenoid. i would suggest crimping mating connector on machine as to not alter solenoid in any way, in case you have to send back. If it works (it should) then make it a permanent installation. Good luck!
2001 Trailboss 325
Mountain View Mo., Fire 1+2 certified, hazmat ops certified, vehicle rescue technician.
I fix everything myself, if i cant, it don't need fixed! 10 yr electrician