This is the stock GTM kit alternator mount.  The system works fine with the LS-1 however, with higher RPM's and a better overall option, I decided to install the Cadillac CTS-V alternator and mount.  The Cadillac alternator has a slightly different electrical connection.  The GMPP harness actually has the correct connector and a single cable.  I've not reconfigured the cable yet and may not neet to.  Additionally, the main power lead going to the alternator appears much smaller so I'll need to figure out the reason and wire accordingly.