72 Fury blower motor… Which wires?

My car had factory air conditioning. My buddy and I put a new style compressor on it and he got the AC working! Unfortunately, previous owner did something under the dash and I had not noticed previously but there seems to be some sort of replacement switch for the fan on the dash. No matter what I do the fan stays on low setting. It's very tantalizing but certainly not enough air. This weekend I'm going to try to fix that and find the wires for the fan speed. Does anybody know what they...

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Author: MBar