OBD1 b18 in to 98 Ek OBD2a HELP! ASAP

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Ek Crazy

New Member
I have just got a OBD1 GSR engine out of a 95 integra for dirt cheap and im putting it in my ek civic ..engine is in and im at a stand still on the re wiring of using my stock si harness,i have the OBD2a To OBD1 conversion harness ready to go with my p72 ecu, my problem is : After taking a closer look at my ek harness i found my alternator plug is a 3 wire not a 4 wire like the alternator already on the b18 engine .Do i have to run a wire to the ecm(A19) to fix this (wanting to keep the obd1 alternator) any help anyone....
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I believe the 3 wire alternator is an obd1 and 4 wire is obd2 right? There was a comparison picture online somewhere.

That's kinda wierd.
 
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