This is my NE Galion wall phone, with the latch switch, a North dial, and straight line ringer. I've included a close up of the wiring diagram.
My understanding is this is the same wiring diagram for the desk phone with latch switch.
Note: the handset cord and line cord are not shown in the pics and should be connected per the wiring diagram.
(Feel free to use these pics for any other references you need)
I cleaned it up a little bit.