Ah, ok. That's a different beast. If for an LS conversion then I highly recommend you treat them as "almost" entirely different systems. ISIS will replace your existing "body" harness (inputs and outputs for wipers, lights etc). Unless you want a HUGE project on your hands, you will want to go to a specialist like SpearTech (there are others) to build you a dedicated engine (& trans) harness with all the connectors you are referring to for sensors etc. Get the ECM/TCM's and accel pedal to match your exact engine setup. Where the two harnesses "meet" is using ISIS to supply 12v ign to the eng/trans harness, a starter wire and possibly a few others depending on your setup and who's harness you go with. It's a chunk of change for most pre-done harnesses but it's a whole lot of headache taken care of. Others take a factory harness and simplify it but that is also a lot of work IMHO. Potentially less expensive but time consuming unless you have done it before.
G.