Put it on the opposite side of the motor, and use zip ties to keep the spur from eating the wires. I've seen it done, looked just fine and worked great. If you want, you could even go with a short section of alum. angle bolted to the left chassis plate, that'd make it look a bit cleaner.
what you could do is like dabid said, use angled aluminum and mount it on the inside of the tvp. it would protect the wires if you take the angled aluminum and cut either the bottom or the side long and the opposte to the correct length and simple bend a 90 degree angle in it. ill see if i can make something to show what i mean if you dont understand.
I'd try to get it next to the motor there too and keep the wires away from the spur with zip ties if you have room.either that or on the shock tower if there's room.if you do have to mount it outside the TVPs then you'd need to build some protection for it or stones/projectiles from the front tyres will damage it.