Ross,
I have 2 alligator clips I could use I tried putting one on the roller and one on the outside wheel but nothing happens?????????????????
As I said last evening, if it didn't work with one side of the wheels, try the other.
Regardless, try each wheel in turn until one gets the engine powered up. Keep trying until you've tried all of the wheels. Each time you connect a pair of wires, you have to then press READ to see if the engine is found by DCS.
As I also told you last evening, if DCS cannot find it at all when you press READ, using the pickup roller to the red TIU post and each wheel in turn to the black TIU post, take it to someone who can test it.