seat belt mounting

hi,

i bought a set of XV seatbelts (link: http://www.xvmotorsports.com/products/detail/index.cfm?nPID=113 )and i am putting them in the dart with some high back buckets i got last week.

the previous owner had installed some seats out of a newer car that looked horrible in there and were also just attached by drilling holes in the floor and bolting it down.

and the seatbelts were just drilled through and bolted down.

with the 3 point XV belts, they use the stock shoulder and lap belt mounting locations to the outside of the car. But on the inside, where the belt (receiver?) gets mounted, i'm not sure where its supposed to go. Does it attactch to the seat? I can't find anywere on the bottom of the tunnel that looks like it attached to the floor (no extra support structure).

i should have double checked last night when i was looking at a barracuda, but it slipped my mind

Thanks,

Steve