IH Loadstar 1700 ~1969 Oil Pressure Gauge Wiring?

Got this 1969 ish 1700 4x4 which shows no oil pressure. I am pretty sure the engine is fine. No voltage on the stud at the sending unit stopped or running. The temperature gauge probably not working also although I have not run it a lot in this condition. Of the fuses inside the glove box, none of the labels gives me confidence it is the one for the gauges. Also the fuel gauge does seem to work.

Before I start wedging myself under the dash, does anybody have a wiring diagram for how...

IH Loadstar 1700 ~1969 Oil Pressure Gauge Wiring?

IH Loadstar 1700 ~1969 Oil Pressure Gauge Wiring?