225 trophy - bucket seat rails....

[jaymosx]

Hi guys I've seen ktr do seat rails but from my understanding the seat belt receivers (where the seat belt clicks into) fit to the original seat/rail so when you remove the OEM seat for a bucket you lose that mounting point?
I've been trying to find adjustable rails that accommodate the original seat belt point too for MOT purposes mainly as I will be running a harness too. The other issue is where would you fit the left hand side lower strap for a 4 point harness if you don't have that seat belt point which is usually fitted into the shell of the car (near center console)

Thanks and sorry if this is an easy question I am very new to these cars!