From the back, the fan unit comes out and disconnects via one jack plug. Then the top connector U comes off with wingnuts and I rest it on top of the rack. If necessary, it mostly has the ouputs from the ADA8200 and USB which all disconnect easily.
From the front, That top connector block comes out easily enough which lets me get hands in if I need to check anything. For serious work, the ADA and the power switch module have enough slack to slide outwards partially.
There is enough cable slack everywhere to slide any individual item out and/or all of the panel connector modules.