How to remove upper rear cushion. I have removed the lower bolts. on 2001 Buick LeSabre

I have removed the two bolt under the rear seat that holds the upper cushion on my 2001 Buick Lasabre Custom. How do I get the rest of the upper rear cushion loose? Are there other bolts holding it in place? I have a rattle in the rear upper cushion I want to fix.

Asked by for the 2001 Buick LeSabre