Intake runner at rear of engine, cap it.
Intake plenum at rear goes to the firewall.
Intake plenum at front goes to Ign Module.
Regulator goes to valve cover breather molded hose.
Large evap hose goes from throttle to valve on fender.
I expect that the other upper throttle connection goes to the thermal valve which then goes back over to the fender to operate the valve for the evap function.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff