Digitus is nothing special anyway, but any rackmount panel has nothing at the back that you can screw down. It has screw holes at the front for mounting to a rack or bracket is recessed behind that, so the screw holes need to standout around 100mm from the back wall at precise spacing plus allow enough in front for patch cables. Also you would need to make the standoffs from a material that allows the panel to be screwed on and off several times with small enough screws to avoid poking them into cables
Better to use the surfacemount panel. Cable exits from the side of the panel and allows a shallower cupboard without squeezing the cables.