Camper 12 v fridge question!

Hi all
I've not posted for ages, but you've alway been able to help me in the past, so hopefully you can again!

The fridge on my 92 hiace camper won't work. Ove traced to some rusty connectors in the main body of the 12v system.
I know it's this as I've had to clean them up before.
Excuse my numptiness here, but there are two gold blocks (perhaps resistors or mini coils??) each with three wires going into them.
It's one of these where the problem is.

My issue is that I don't know what is it or where to even start looking for a replacement.

Might anyone be able to help me out?

Many thanks
Nick

Can you try describing better, maybe with pictures? I'm not clear what these blocks are for!

Are there screw terminals on them? What colour are the wires?

Cheers,
W.