prius driver seat disassembly

So my seat heater went out in my 2010 Prius with Katskin leather seats. I bought it used. Blowing fuses and testing for continuity there was non. I wanted to fix it right away so I bought a replacement and took the seat out of the car. I'm having a difficult time removing the plastics where the tilt and seat lifter pump is at. I do not know how to get around them or there removal.

A search has helped me none and I do not know how to continue. Hopefully one of the knowledgeable folks around here can point me in the right direction.