[dagskarlsen]

Hi. You do have 2 so it shall probably be equal. A close picture of the wiring diagram on the door would also help us to help. A close picture of the contact springs and and terminals on the generator might be good too. Generally these had 3 terminals, where sometimes only 2 was used. The hone closest to the magnets are connected to the chassis of the generator, and this was usually connected to the line terminal named L2, the middle one was connected to the Ringer, and the last to L1. With this solution the calling telephone has a silent ringer to let all the power go to the callee.

Photos may help us to find the exact model of your phone.
(Here will the visible text on the components an schematics on the door be of importance.)

dsk