In an attempt to help you brainstorm.....IAT sensor needs a new plug so you need to source one out and extend the line. I apologize but I am not sure about the color codes as they will apply to the correct IAT plug for the sensor. If you have access to a local junkyard/dismantler/recycler go there and find an OBD2 DOHC VTEC to use as a reference
One of your plugs that isn't being used is for the evap purge solenoid. It is a small solenoid that has vacuum lines that lead into the charcoal canister. JDM motor do not use this solenoid.
One of your plugs that isn't being used is for the evap purge solenoid. It is a small solenoid that has vacuum lines that lead into the charcoal canister. JDM motor do not use this solenoid.