How many meter the heater from the floor?

That look too low.

Ask the installer reinstall the heater higher. Than change the inlet to PVC pipe. That solve your both problem. Pipe and height.

Must be a girl.

Life doesn't matter, must look pretty 1st.

The main problem is not the plug and socket. But the heater is too low and near to the shower head.

Even through the heater have a splash proof casing, I don't think you will comfort with it everytime splash the water on it during bath.

The metal flex hose is advise to change to non conductor material incase electric shock. Current run on surface of the material.

So with that flex hose long tangle down that ugly, why not install the heater higher and change the flex hose to pvc pipe.

That will be look better and safer.

I think the manual do have suggest a sefety way of installing. Otherwise somebody sue the manufacturing already.

Here my example when I install the heater myself. The rainshower is higher than the heater definitely. And it abit nearer to the heater. I can't raise anymore the heater since the rainshower nature is higher.

I found out that the wire in the hole even have a rubber gourmet to prevent the water in, but the protection is not enough. I still can see some space between the wire. If the water sip in through the wire and flow into the heater, Kaboom.

So have to seal it with additional sealant. No choice even it ugly. Safety 1st.

Most of the heater is using side entry. But how they seal it properly will be their design strength.

Ya, bottom or slant down will be better design.

Ya, this is better. But I don't see any heater that have bottom open for wire so far.

Flip around also cannot find the bottom hole.

Another way is use cable glands. But provided the cable is 3core seal.