I bought on Aliexpress a powerswitch splitter, so that any computer can be turned off from 2 buttons (one on the desktop, and one in the room where I'm using the desktop),

but now that I was about to install it I'm realizing it might not work. Seems my motherboard is using this single cable to bridge its chassi with the motherboard. So I guess unless I'm willing to mess with this cable by cutting it up and soldiering a splitter onto one wire, my idea isn't going to work?