Oil Pressure, and Oil temp.

Looking at them, I have two guages, and two "looms" if you can call them that.

Now I've got a funny feeling I'm missing something, as there are 3 screw type things, with nuts on on the rear, and I assume these for the sensors. The sensors being the thing I'm missing.

Can anyone help? See photos below....

You can see the three pins sticking up..



From the guages comes this, a connector block, and a power supply thingy thing.








The loom finishes with two wires as show below








If anyopne knows what I'm missing, can they point me in a direction to find the parts I need?


Thanks