There are only two wires in the reserved opening of the bathroom socket

Generally, the switch controls the live wire.

One of these 2 wires is the live wire, turn off the light and use a voltage tester to measure which is the live wire, and then connect one wire to a terminal of another switch, and the other terminal of the switch is connected to the third wire in the wire box of the switch. >>>More

If you decorate this thing, you have to think about it.。。。 If you get it later. It's very sensible and hard to get. Isn't it.. So.. Forget it... It's also not safe.

In order not to spoil the overall effect, give up the use of smart toilet seats; >>>More

If there are several electrical appliances, there must be several switches and sockets. It's good to reserve a high socket, and do a good job of the kind of socket with a lid on the blue side of the upper beam, as well as a socket with a switch. Watertight.

All you have to do is buy some filler cement to make up for it, and when it's dry, then install the socket.