I just completed this swap today. Got a deal on some recaros out of a 2016 and I took a chance. Connectors are exactly the same. Drivers seat requires nothing to work. The only thing you need is the passenger side occupancy sensor. Once you swap the bladder over you’re golden.
You can either...
Do you have the connector in your trunk? I’m starting to think that’s only there for 19+. On my car the harness goes straight though the trunk to the evap.