yeah you do.
the s14 uses the big white plug next to the ECU as its 'converting' plug.
the s13 uses the white dash plug next to the ECU and the two Grey and brown power plugs next to the battery.
its not a hard job. use a s13 to s13 sr wiring diagram to see what the 'power plug' and 'dash plug' on the vert are
use a fsm or s14 (F4 or F3)plug pinout to see what those wires are. and connect them.
thats how i did mine
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