where to run obd1 harness

i’m doing a b18c1 swap into my 90 integra and not sure where i’m supposed to run the wires. only place i can think of is the firewall but it looks like i’m going to have to take my dash out to run it that way. is there an easier way to do this?

Are you talking about the main engine harness? Or a vtec sub-harness?

the vtec sub harness