I just got a replacement ballast for my T5 lighting. While I've wired up t5 ballasts before, the schematic for this one reads a little bit different (this isn't the actual
diagram, just a very similar one I grabbed online):

The circled part means that it doesn't matter which slot tubes 1 and 2 are connected (yellow wire), just so long as they are connected by one wire with one wire on each tube going from the other slot on the tube to the ballast?
I hope this question makes sense.... I'm no electrician but I have managed to decipher some electrical schematics for things I've tinkered with. The other ballast I've wired had the two inside slots for the tubes wired together with the outside slots going to the ballast...