i just swapped a b16 out of an si into my 99 hx

i had to switch the harness on the si motor from obd2B to my obd2A harness because i recently found out 99 hx's are obdIIa

anyway so now i have 4 plugs coming from the engine harness
1 plug- plugs into the car's harness which is green

the other 3 plugs- plug into the computer (im running a p72 for now)

with the harness will all 4 plugs plug into the harness?

or jsut the 3 ecu plugs, then plug into the ecu meanwhile the greenplug from the engine harness will still plug into the car's harness

my plan is to either
1) obd2A to obd2B P2T computer
2) obd2A to obd1 p28

i know the p28 is tuneable and would be best but i already have the SI computer

pictures would help

thanks

 

some help please!

 

ttt just some guidence please