You should get a couple of old-work low voltage brackets and brush wall plates (https://www.homedepot.com/p/Carlon-1-Gang-Non-Metallic-Low-Voltage-Old-Work-Brac

You should get a couple of old-work low voltage brackets and brush wall plates (https://www.homedepot.com/p/Carlon-1-Gang-Non-Metallic-Low-Voltage-Old-Work-Bracket-SC100RR/100160916 https://www.homedepot.com/p/Carlon-1-Gang-Non-Metallic-Low-V..., https://www.homedepot.com/p/Commercial-Electric-1-Gang-Brush-Plastic-Wall-Plate-White-5038-WH/207161871 https://www.homedepot.com/p/Commercial-Electric-1-Gang-Brush...), and route the power cable through the wall. It would look much nicer.