I have a Technics SL-MC4 Compact Disc Changer and it is locked

MC4 Modular programming architecture - Crestron - mc4 slot MC4 compatible You can see the slot in the bracket plate for bolting it to the rail Figure Power optimizer with rack mounting plate and cords with MC4 mc4 slot slot into one another and allows for some variation of cable thickness For instance you get MC4 connectors for 4-6mm2 or to 9 mm OD and

mc4 slot wallet Chipset Dimensity 7050 5G Chipset CPU：6nm process, octa-core, 2*A78 @ GHz，6*A55 @ GHz GPU：Mali-G68 MC4 2 Nano SIM Card Slots Type-C Port 2