Hi, I'm switching out an engine and need some Wiring help. Briggs 407777 0137E1 010410YG. Off a Murray 461000x71A tractor. There are 2 wire clips coming off the donor engine one clip has both a red and black wire, and the other clip has a gray and black set of wires. Also there is a heavy gauge red wire that goes to the starter. The zero turn tractor I'm putting this engine on has the following 4 wires which I have identified: oil pressure wire, Fuel Solenoid wire, Regulator, and Magneto Kill, and the heavy starter wire. Can someone please help me with this wiring.