It's located near the actuator and to the right of the starter motor? It's grey and is loose. Is being loose a problem and can this be replaced?

How many wires in it? Is it the plug for the oil pressure switch on the side of the head?

Is it on the coolant tree?

I think it's 2 but can't say 100% and its close to the coolant tree. There is a lot of stuff blocking the view so I can't say 100% if it's part of the coolant tree...

The water temp gauge connector is grey, but the connector in your pic looks a bit different.
Does your water temp gauge work?
 
I found this pic.
The oil pressure sender connector in the pic is also different to the one in your pic.
This diagram is for a turbo but the NA loom is much the same.
 

Awesome thanks for the pic... Yeah the water temp gauge works... based on the photo it looks like it's the cold start timer switch

The cold start timer connector should be black, but is yours just dirty.
It does look the correct shape though.
I also made an edit to my first post.

Yeah my pic does look different and I'm pretty sure I don't have the oil pressure sensor connection there but I'll need to double check...

petmr2
Yeah my pic does look different and I'm pretty sure I don't have the oil pressure sensor connection there but I'll need to double check...

I can see the black connector for the oil press sender connector just above the green plug in your pic.
Some oil pressure sender connectors are a different shape.

Ah I see what you mean. That black connection is not connected to anything. I do see one empty slot near it but unable to reach due to the length. I'll try again tonight to see if I can get it connected