Seat Foam Question

[Iron_Pig]

I'm looking at doing my own with aftermarket seat covers and foam from SOR or the like. My question is,what do you do with the wiring (springs) in the seat bottom? It looks like it may have been molded into the original foam. I have one outside wire sticking well outside of the foam,on the driver's bottom. I've checked,it's not broke...the foam is toast!
So when you get the formed bottom cushion from SOR,how does it join with the springs?
My seats are the original high-back w/ headrest from a '78 FJ40.

 

[Otis]

I used the SOR foam cushions when I reupholstered the seats in my ’82 FJ40 a few months ago. The foam cushion just sits on top of the seat pan springs. The cover holds the cushion in place when attached with the hogrings. The seats turned out really nice. However, the foam cushions are really firm.