I will have to look and see about the plug although the only plugs you could mix up Besides the coils and spark plugs
is the turn signals Triumph used a different plug for each. anyway here is a shot of the proper coil wiring Number 2 coil as mounted on the bike.
OK check and see if the three wires into the plug are pink/gray, pink/black and just pink if so it is the map sensor plug which is mounter towards the rear and same side of the intake that you have the IAT plugged into.
I am not quite sure because its been years since I have seen a air box on a bike