This is from memory..... but the first pic is a breather hose. Attaches between the 3 and 4 intake runner with more than is pictured.

Second pic the "S" hose is backwards, cold start valve sits in one of the taped over holes. The other side of the idle valve attaches to the air flow meter housing, not pictured, with another hose and barb fitting.

FWIW, almost none of that needed to be disassembled to do the head gasket.

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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