Lower dash rail first of all, mounting plate on tunnel, remove heater control facia from the cable plate, just two slotted screws and this gives better access as it swings out of the way better, insert/place evaporator/fan box on mounting plate from passenger side (it’s a tight fit, be sure drain plug is in place first), mount to the plate, put facia back on, install facia assembly (two 6mm bolts each side), be sure A/C sensing pipe is inserted into evap box (do this before assembling the box itself), put switches in A/C panel, check wiring (heater fan, A/C temp and fan switches) to make sure they work, install side panels, install shift platform. Hope I didn’t leave anything out.