It's a bath bomb, right?!!!!
All the so-called bath bombs are nothing more than a combination of the infrared baking lamps that used to be found in medical clinics, with a couple of waterproof lampholders, switches, and nothing more, without too much of a doodad.
You can go to any electrical store to buy a 10A or more power supply with a plug line, back to open the bath, remove the original socket, the line color butt can be.
Note that the one with the white or yellow wire in green is the ground wire!
--Lonely Big Mountain Man