Agreed with everyone on here - draw it out. I ended up making a little power point with all my kettles, and all the various ports / valves. Then I made a slide for each step of the brew process... 1 - fill HLT, 2 - heat & recirc to reach strike temp, 3 - pump to mash tun, 4 - top off HLT, 5 - recirc MT through HERMS while recirculaing HLT... etc etc etc all the way to "pump wort through chill plate and into carboy while another hose is discharging the cooling water into my HLT to be used for cleaning"
I then color coded the hoses and drew them connecting various points on my kettles (the inlets / outlets) and came up with a rough estimate of how long each hose needed to be (not a fitting question, but still worth discussing). Then I made sure that same hose could be used for various other parts of the step.
Then it was a matter of deciding that all the kettles would be "male" and all the hoses would be "female / female". Then trying to figure out if I wanted straight fittings for the hoses, or if some made more sense to have 90's on them (because my pumps are under my kettles, so the 90's take out any kinks).
Then it was a process of making sure every cam either connected to a 90 (FPT) or had the big-flow barb or was a MPT end that I could thread the hose directly onto.
Do that process about 7 times, then order everything... then put it all together and order the 3 random parts you forgot about.
GOOD LUCK!
-Kevin