I have a 4, not a 4A though they are possibly the same in this instance.
The washer tube slips through a grommet just below the commission plate, very near the bottle itself:
The OD relay is typically mounted on the back of the battery box, center and near the bottom edge:
Note that I installed mine when I added OD - so
not original. I pointed the contacts up but have seen some that have the contacts pointing down, which may very well be correct.
BTW - That is an inline 8 amp Slow-Blow fuse added to the brown wire circuit. In theory it should save the wiring if the internal OD solenoid switch that energizes the pull-in coil should ever stick. Has been known to happen.