Injector resistor Box problem

HI,

I am converting from DPFI to MPFI.
I bought a injector resistor box off of Ebay.
It saud works for any MPFI conversion.
It came off of a Honda Accord.
I was reading the FAQ on how to convert at a web site.
It said somwhere to connect the combined connection to the yellow/black wire on the injector box.
Well my injector box looks like the Si one but has one red wire and 4 black ones. Also where does it plug into?
Thanks