Help with Rallye harness replacing standard harness 70 dart

Thanks to all. I haven't found a schematic for a 70 Rallye dash wiring. I do have the 70 Dart service manual showing the regular dash wiring. There are only a few challenges to sort out with tracing and continuity checks. I should be able to eliminate these one at a time. The Rallye harness I have is used and was for AC which I don't have, so some extras and some things not there for a non AC car but workable. My main concern is the bulkhead disconnect on the standard harness has white wirers running from the C and D positions but the Rallye harness has nothing in C or D. Plus the Rallye bulkhead has a White and a Black coming from the W slot where the non-rallye has just a black. Wondering if that white wire in the W slot takes the place of the white wires in C and D of the standard harness? If anyone has a thought on this that would be appreciated. Thanks.