Controller box needs to be deeper


I just installed my Rachio 3 16 zone controller. I have two bundles of irrigation cable plus a pump start relay cable that needs to come in to the controller. There is not enough depth to accommodate all the wires and the controller top does not attach. If there were screws to attach the top piece it would be better than the magnets as I think it would close by compressing the wire bundles. If it was about 1/2" deeper it would be much better.