I recently swapped a 1992 civic dx obd1 d15b7 block for a burnt out 1988 crx dx obd0 d15b2 block. The swap went great! everything worked perfectly excpet this one plug that wasn't on the back of the 92 civic block, but was on the back of the crx block. The plug is circled in red, how can i switch this plug off of the 88 block and put it on to the 92 block??? Does anyone know what it is??? Thanks.