RB20 wiring

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supi have a question im helping a friend with his rb20 swap into 90 s13 hatch,now i know u have to wire the white/purple rb wire to the thick white ign wire coming from the fuse box, but ive check and cant find the white purple wire coming from the grey rb plug next to the brown plug, the wires i have areyellow/green, green/yellow, red/grey spots, orange/blue, blue/green, blue/green ,black/red ,black/whiteis that right shouldnt there be a white purple please help.thanks in advance.

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anybody please.