In order to provide access to the computer's hardware and wiring the entire lid/cage is hinged on the left side. All motherboard connections must be routed through the big hole in the base -- even the keyboard and mouse cables. The motherboard itself is insulated from the copper tubing with fiberglass laminate countertop material -- in a green marble finish. The Gods reckoned it would be entertaining if my powersupply cable didn't quite reach the header on the motherboard. So it didn't. Somebody told me they sell extension cables to solve this dilemma, thank goodness.