New Underdash Wire Harness Question

I don't know if this helps at all but I have a 73 duster and I was just putting the under dash wiring harness back in along with my homemade wiring harness as a store-bought one is just wires with ends LOL but anyways I know on my passenger side door but it only has one wire going to it and then on the driver side it does have two? So I don't know if that helps but it sounds normal.