1) Insert the black expansion screw into the installation hole, we can press it hard or screw it down.

2) First, connect A plug to the B plastic resin chock, pls pay attention to the hole position. Put the round gasket under the base.

3) Let the screw that is inside of black rubber go through the base of toilet.

4) Insert the screw into the expansion screw hole of the toilet, then screw it down. Next, just need to screw it down, we don’t need to tighten it completely at this step, once the pitch hole is confirmed and screw it down, we could adjust the pitch hole and length by the rotatable of plug. After the position is confirmed, then we can screw it down until the screw can’t be turned.

5) Set the metal cover in after finishing fixing the base.

6) Buckle the installed toilet seat up, that is ok.