I see. Paul Woods discovered where a change would need to be done based on all his other swaps but the other guy found that the 10ohm resistor is needed in place of the factory one. Is it 10ohm or 10,000ohm?
I'll be doing a very in depth write up on GEN4 3SGTE into JDM cars in the future so it will all be covered there. There is nothing available stating exactly the changes needed, people either say get a wiring harness from other suppliers or splice what you think is needed. Both are unhelpful and even the bought harnesses are not ideal to the way I want things working. But in saying that the 5SFE powered USDM cars never had an engine bay cooling fan so that wiring doesn't exist in those cars. I want the intercooler fan controlled by the OEM system. Others may not.
That adapter can work if you are using the OEM GEN4 neck. Again I want the OEM system working as per the factory way. Obviously the GEN3 3SGE or 3SGTE neck is best for this in the MR2. You obviously need the 3SGTE top cap with the turbo coolant feed if you go this route.