im gonna swap tpi from my 91 z28 to my 89 rs. now when i took out the harness of the z28, i noticed it goes into the car in 2 places. the pass side went to the ecm, and the drivers side went to the dash and controls. now my question is, do i need all the wires and connectors that went into the drivers side, or do i just need the connecters that go to the ecm and to the tpi itself and reuse the wires i already have in the rs for the tach n such. i still have the donor car so if i need to i can get everything. help!