Nah i wasnt happy with having the tray going in and out with all the parts in a decent way. So ended up removing the rear of the tray from the main part and just used the bay instead.
Yes that is a switch, just a dpst, but only using one side.
That wire on the spring isnt fully fitted yet, was just laid on top for sizing by length. It will go underneath the spring and be glued down out of the way.