No grounded outlets anywhere in the house? Are your bathroom and kitchen outlets on gfcis? I think that is required in California.
Edit: I guess only if the bathroom or kitchen had been remodeled in the last 40ish years lol.
I got an angle mount from Amazon. Downside it uses a double sided tape so you can't move it. I wanted it in the corner of the tank. The wire just comes from the back of the tank.