AC VACUUM SWITCH 2571501 AND 2096084 QUESTIONS

Hi all, trying to wrap up this dash install on our 67 cuda. I bought a replacement ac vacuum switch as one nipple broke and another had previously been repaired. So the replacement I bought was a used 2571501, which "may" be a replacement. I installed it but cant get the blower to come on. I may have gotten wires mixed up as the electrical connectors on the back are different between the 2. No part# on ours but I'm assuming 2096084(from 67 parts book).
Electrical layout is similar but not the same. I dont need the AC to function, but I would like defrost/heat if need be. Anyone know how to test or verify the wiring connections?
Thanks
Steve

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