Found my dads original 1971 duster!

Well guys. Pretty good day. A friend stopped by and we got the heater cables all hooked up. I installed the speaker and radio. Put dash temporarily in place and tested everything and it all worked perfectly!
BAD end to the day though. I then completely installed the dash, re tried everything….and now the radio and heater fan won’t work. Pretty frustrating end to the day. It went in very easily and nothing pinched or did anything that I felt. I’ve just now pulled it back out. So now I have to sort out what happened :(