How to install Spotlight Pro plug-in to feed cable from outside to inside outlet & Spare Parts from Ring

I currently have a Nest camera. The cable feeds straight thru the mount into a hole in the wall that allows me to plug that camera into an outlet indoors. I want to replace the Nest with a Ring Spotlight Pro plug-in, but the mounting it comes with expects you to plug it in outdoors not feed into a wall. I see there is a Spare Parts accessory, but I don’t see instructions for it, but it appears it might be the solution I want. Anyone accomplish what I want to do?