[Redroc]

Nader, I'm finishing up installing 6-pt harnesses in my 944. Per Sparco's instructions the sub-belts should be anchored about 4" apart from each other and far enough back so that they are behind the sub-hole in the seat. On 944's you can't anchor them too far back (unless you go way back) because there is a hollowed out double walled section of floor directly beneath your butt. I just drilled through the floor, dropped in the supplied eye bolt, and threaded it into the 2"x3" metal plates with a welded nut on them. The plates do not come with the belts but OG has them for $4 each.

For the outer lap belt I threaded the eye bolt into the stock seat belt anchor point. For the inner lap belt I drilled through the center tunnel and installed an eye bolt with a reinforcement plate.