Just finished building and populating a new 120g+50g tank, and planning to get a reefangel, just for a reason its open source, and I am a linux user for a while as well

I will have at least 4 float switches: 3 in the sump (low water level turn on the AT; low water level turn off main pump; high water level turn on main pump +alarm) and one in the main display (high water level turn off main pump). Where to plug all these in?
I will have 7 pumps (main; circulating; skimmer; reactor; AT; 2 wavekakers) with timing sequence; 3+1 light with timing sequence; 2 heaters; to save on plugs I might be able to combine some together. But definitely lot of wires.
The most important I need to solve the safety (float level) switches, what all I need to plug them all?