Installation Toilet Seat Step : 6] 7 PCMCIA Bra Anchor 6. After removing the plastic wrapping, push the protruding tabs rightward while pulling upward on the mounting assembly, line up entire assembly with the toilet seat holes on top of the toilet. 7. Remove hardware package taped to the toilet seat cover, insert metal plate onto recessed cut-out on the plastic bracket attached, insert screw with plastic anchor attached into toilet seat hole on toilet and tighten using a fillips screwdriver. 8.