Cold Start System Testing (hard starting)

[Bossard]

I have a Celica with a similar problem: hard starting as soon as it goes down to say 60 degrees or below. I think it is the cold start injector not working because if I spray a small burst of starting fluid into the throttle housing through the butterfly plate it kicks right off. I have a Celica GTS with a 2.2 liter engine. There is a relay block in the engine compartment with a lid with markings. One of the markings says fuel and there is no fuse or connector plugged in where that fuel marking indicates inside. I wonder what this is for. My other Celica has a two pronged copper connector where this one has none on the same engine. Does anyone think that could be the connection for the completed circuit for the cold start injector?