i dont know much about installing a new wiring harness when doing my engine swap and I had a question

basically the only thing that is connected within the firewall (cabin side) is the ecu.

all the wires that go out of the ecu go straight thru the firewall and connect into the engine and various other parts in the engine bay (excluding fuel pump wiring)...

this is what i was told on hondaswap.com so i'm just confirming this..

also can someone tell me where the ecu in my dual carby breeze is?