power switch

Hi all

I find this group very interesting, even though most of what I see is WAY
over my head!! I feel many of you are quite knowledgeable about
electricity/electronics so hope someone can help.

I bought a used power feed for my Bridgeport mill. It's the original
Bridgeport power feed, has a 220v 3 phase motor, and an Allen Bradley push
button switch with the green start button and red stop button.

There are 6 wires coming from the switch housing. 3 come from inside the
motor (obviously for the 3 legs of power.) The other 3 wires, one is
connected to terminal 1, one to terminal 2 (which is internally jumpered to
what would be a terminal 4) and one to terminal 3. What appears to happen
(I haven't metered it yet, just looked up inside of the switch at the
contacts which are visible without disassembly) is when you push one button
terminals 1&2/4 contact, but only for as long as you hold the button in.
Pushing the other button appears to momentarily close the 3&2/4.

My question is since all of these contacts appear to be momentary instead of
continuous what is going to keep a 3 pole contactor energized so it will run
until you hit the stop button?

I could just put a switch in line with the contactor coil and make it work,
but would rather use the existing switch if someone can tell me how to make
it work.

Thanks

Lew Best
Waco, TX 76710