I’d have the SN on top simply because it’s easier to get to the volume knob. I would forget the panel - you want your wires hanging free to get the best from the system.
To keep the Snaic and IC off the deck you might need the NDX2 on the bottom, then hicap and amp. This is probably optimum anyway but swapping hicap and ND is an experiment worth trying if the Snaic still clears.
…I would most likely go the opposite, with NDX on top, then HiCap, the SN2 on the bottom. I control my system from the listening position with either the iPad or remote.
In my 4 shelf set-up (not on Fraim but Quadraspire) I have the NDX2, then SN2, then Open space for future HiCap and a XPS DR on the bottom.