You would have to get the harness from a 04 or 05 sled and split the cases and install the new harness and stator. I'm going to guess your buddy has a 03.5 rev as those were the only rev's that didn't come from the factory with it.
No, do a search the very first rev's 03.5 did not have it. My 02 700 does not have it. Only some of the newer zx chassis's had it. After 04 all had it.