Wiring diagram for GTE 881A speaker phone

[RotoTech99]

Dear CRPF:

Hello, I'm getting a GTE 881A single line speakerphone soon after having one about 15 years back, and need the diagram to put a modular line cord on it.

I'll use the existing cord for the power supply.

I think I have a couple GTE shop practices on the 881A and B sets, but aren't sure where they are.

If any member can find this diagram please post it.

Thank you,
RotoTech99