Sr seats into basic spec

[totalnova]

I've ripped the old seats out and had a look at the bottoms of each seat and they are different the Sr seats have the runners on and has an adjuster that goes all the way across, where the basic spec just has a small handle. It looks like the Sr seats don't just bolt in where the old ones come out so what am I missing?
cheers Nick

[Will F]

If you have the complete sub frame from the new seat - they bolt up