Just use the plug off the ZE and join/match up the wires to your dashboard loom. You will need to use a Tacho interface form a VR-4 or other vehicle to make your tacho work.
Before you start double check here first:
http://www.club4ag.com/technical_main.htm
ECU Connections AE92 1988-1989 Japan Spec
Socket A (Yellow 14 pin)
Pin (ECU) Connection
1 B1 EFI Main
2 Batt BATT
3 CCO Exhaust Temp Sensor
4 FC Curcuit Opening relay(fuel)
5 ECT ECT-S (Suspension Control)
6 L3 ECT-S (Suspension Control)
7 L1 ECT-S (Suspension Control)
8 B EFI Main
9 W Check Engine Lamp
10 EGW Exhaust Temp Warn. Lamp
11 A/C Air Conditioner clutch
12 SPD Speed Sensor (instrument panel)
13 not used
14 L2 ECT-S (Suspension Control)
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Y Connector (22pin) 4AG-ZE
Pin (ECU) Connection
1 BATT R-W Battery JB3
2 ELS2 B Idle-up diode
3 EGW R Exhaust temp lamp (inst panel)
4 ELS1 Battery JB3
5 Check engine lamp (inst panel)
6 FPR Fuel Pump relay
7 - Not Used
8 TIL Supercharger indicator (inst panel)
9 SPD Speed sensor (inst panel)
10 A/C A/C Clutch
11 STA Ignition Starter
12 +B EFI main relay
13 +B1 EFI main relay
14 FC Circuit opening relay
15 CCO Diagnostic Connector
16 Not Used
17 Not Used
18 Not Used
19 Not Used
20 Not Used
21 Not Used
22 Not Used