Fueling & Injection - Fuel injector connector mix up

Hi Im currently working on my heads, and I unpluged all my fuel injectors and Im a little worried on where one of these injectors are supposed to be connected I have all my injectors marked except these 2, its on the drivers side Injectors 1 and 2 I don't know which is which, whats the easier way to find out?

It shouldn't matter...............

K thanks