The ZZP SSIC is essentially two aluminum plates that sandwich a small heater core and the 3/8" feed and return hoses in place. Put those hoses on the fittings and carefully assemble the plates so that you do not pinch anything. A very light layer of silicone sealant is used. I don't know why you are asking this question as all of the SSIC's that I have seen are purchased assembled and don't arrive in pieces?
When installing use the longer supercharger bolts provided, a gasket above, below and use a small bead of sealant on all surfaces of the SSIC. Don't forget the coolant passage O rings on the series II engines. Torque in small increments in the proper sequence and spin the supercharger pulley by hand after every torque sequence to make sure that there is no binding. If there is binding, try backing off the bolts near the snout end just a tiny bit until it spins free.
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "