857 wiring diagram help needed

[moe1965 750]

Hello I'm having a hard time finding a wiring diagram for a 857.  I'm actually replacing the old switch and adding in a solenoid to eliminate the original key switch which I have already done to a 854 some years ago. The difference is the 857 has a red light on the dash and I'm not sure where the wires go for that.  Any help would be appreciated.  Also attached is a picture of the dash with I'm thinking is something the PO added  but not sure. It's not hooked up to anything just wondering if it is also original equipment or add on.      Picture to follow.  Thanks again.    Always fun working on these tractors and bringing them back to life 🙂🙂

Edited July 15, 2023 by moe1965
Picture added

[squonk 41,855]

That is an add on. Here is a diagram for the solenoid:

 

[moe1965 750]

Thank you Squonk.   That's exactly what I need.