Where is the idiot light sender located???

[justafixer]

I am new to the forums I just picked up a 1974 Massey Ferguson Bobcat style loader with a Wisconsin VH4d engine. These engines have an idiot light for the oil pressure. This unit has been thru the ringer it had a blown head gasket, I converted it to a regular distributor the “magneto was trashed” and needs a total rewire of the electrical system. Does anyone have an idea where the oil idiot light sender is located? Thanks in advance for any ideas. It fits right in with my 1955 Ford tractor with a bucket and gannon box I like the old ones.