Cartthago leisure battery connector

[ShiftZZ]

About to try and add an inverter to the van and then find this

Not a connector I have come across before, it's a screw type, no nuts or bolts..

Any suggestions as who to connect to this?

Note the batteries are well hidden behind a board and getting to it is not easy...

 

[Robert Clark]

We had ours cut off and replaced with clamp style ones