How the hell?? Sparco seat brackets... Please inform

[djmatio]

Sorry, forgot to add that they are for Sparco Milano seats.

My question pertains to how these brackets secure to the pan, so really the seat shouldn't matter. Do i cut out the old seats sliders rails/brackets and weld these in somehow?

The tabs on the bottom don't seem to fit to anything on the pan. I'm not even sure which is the front end and which is the back! haha