I used wood screws to secure the boards it to the frame. I drilled guide holes into the boards, put the boards onto the frame asm and drilled tiny pilot holes into the PVC then ran wood screws into it. The screws were long enough to go ito the PVC but not come out the other side.
Toss some cat nip onto it and see what happens.... not much. She didn't seem to care much for her new perch. Hmmmm