Question about windshield washer on 65

I have a 65 Dart GT. There originally was a windshield washer bottle and I think a pump motor, now all gone. My question is how was the pump activated, the wiper knob? And where would I get a pump? One more, all I can find are bottles/reservoirs for a manual washer. Help? Here's a pic of my knob.

View attachment 1715231180

HINT:
If the knob pushes in someone probably changed it to the electric style pump.
If it doesn't push in it's a manual pump system and requires the foot pump on the floor.