Wiper motor has it's own harness that plugs directly into bulkhead connector. In addition there may be neutral switch/backup wires (going to tranny) using that same connector.
Yes, that is why I'm a bit confused as to why the AAW harness has the connectors has wiper wires on it.
But, the harness is 67-75 A body, so maybe it's not something I need for a 70 Duster.