Seat Tracks - which is drivers side / passenger side?

I picked up a couple of sets of A-body bucket seat tracks and I'm trying to figure out which track is for the driver, and which side is for the passenger.

I'll attach some pictures and label them as Track #1 and Track #2. Each have a different amount of what I call "over hang". The portion where the seat bolts up and hangs over the track.

Anyway, I'm hoping someone more experienced than me can point out which one goes on which side. The spare set of tracks I'll put up for sale.

Thanks!