I can’t edit my comment….
brown plug not gray. In Step 3 picture once you reach there just unplug the white wire at the front of the player than you can easily unplug the brown plug to disable the touch buttons. Than just reconnect the white wire and reassemble.
I had trouble putting the vent side back in, it didn’t fit correcly. If it wasn’t late I would of done a proper disassemble. Plus it’s not a full one where it shows taking off the side panels and the front panel to access the touch screen.
if you are having issues with the model shutting off and on, you don’t have to remove the front panel you can get access to the gray plug after you take off all the top and side panels.