The wiper motor sits on top of the near side footwell. You need to feed the drive line through the bulk head, bending just enough to marry to the wiper locations.
Its important to make sure the angle of bend does not restrict the drive wire.
The crucial piece was to see if I had enough room above the heater motor.
As you can see there is not a lot of space above the heater motor, I know other builders have had trouble here. I had placed the heater as low as I could on the bulkhead, I can’t say I knew why at the time!!
The wiper motor was located based on where the end of the drive pipe ended!. I sat it quite deep under the car body as I planned to locate the battery isolation switch on the footwell too, so needed to leave space.