F4R'd ITB'd '92 cup racer
i have these subframes
the holes on the far bottom left and far bottom right, can i use these to mount the lap belt to? or am i better welding a plate in or drilling a new hole in the side section?
i know what to do with the other 3 points, just this one has got me scratching my head
i understand some subframes come with a mounting point for the harness on this inner side (nearest the handbrake) could this hole be for that?

the holes on the far bottom left and far bottom right, can i use these to mount the lap belt to? or am i better welding a plate in or drilling a new hole in the side section?
i know what to do with the other 3 points, just this one has got me scratching my head
i understand some subframes come with a mounting point for the harness on this inner side (nearest the handbrake) could this hole be for that?