Cleaning up under my dash of the '67. Wiring all over the place - tapped into and pigtailed like a birds nest. Found a wire that ran from the dash (couldn't find its beginning) through the drivers side of the firewall near the fuse box, and then ran up along the top of the firewall to the passenger side, and terminated HERE, under the passenger side fender. On the back of what LOOKS like the heater box.

But I couldn't find a beginning for this. Any thoughts on what this is?

Under the passenger fender.....

 

It's the heater blower motor !!