And also seen here....
Only do this on the side that the pretensioner was on. This will allow you to remove the plug through the small space that it is fed through.
Do not remove this plug from the top of the pretensioner..
That would be bad
Then loosen the exact same bolts under your new seats, and feed the wires to the same location.
While you were removing them, you probably will encounter a couple plastic one way plugs. I cant stand these and remove them with pliers. They tend to be harsh on the hands, and never really go back in right. I use electrical tape and just tape it back up to where it was. Works for a long time, and no hassle.
I did keep the black plug that holds the connection of the wire from the seat, and the wire to the body. This one is easy to get out, and goes back on easily as well.
Bolt the Torx bolt attached to the pretensioner into the hole on your new seat, use your old cover, or whatever your new seats comes with and then your are done. Bolt it back into your van, plug it back in and make sure to mount your plug connection back up under your seat so it doesn't get caught in the slide.
When you are done, you can enjoy the comfort of new seats.
Happy hunting.