It depends on the vintage of your engine.
If your engine is a later model MDI electrical system
engine ( start/stop button panel with LED tach and MDI box on the engine), then you donít have to install anything on the engine, itís already there. Just buy a VP temp gauge and daisy chain the gauge to the existing tachometer and youíre set to go.
If you have an earlier model D2-75 without the MDI system, then yes, thatís where the temp sender is installed. There should be a light brown wire tucked into the engine wiring
harness to connect to the sender, and it will run to the instrument panel thru he existing engine harness.