Car wiring harness question

Mike

To start with
Base system
Pioneer F900BT
Peripheral PESWIPS steering wheel controls


I stole this from another thread




Now,
My Metra harness adapter only has wires at pin locations
2,3,4,5,10,11,12,13,14,16,18, 19 and 20, so most won't line up with the factory stuff.

The Peripheral PESWIPS steering wheel interface for pioneer says I need to tap into 6 and 15, but the harness adapter has no wires there. Does anyone know an easy way to remove the wires I don't need from the harness and relocate them?

At a minimum, I just ordered a scosche harness, although it looks the same, but I can at least destroy the molex connector to harvest the wires and pins if needed.

Or am I just missing something obvious?

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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968