Spotlight Cam Wired Adapter?

Have model 5AT3S8 Spotlight cam that's connected to the solar panel. During these winter months it's tough on the panel to keep up with a charge so looking to switch to a wired adapter. Can't seem to find what I want. Picked one up off Amazon the barrel plug kinda fits but it's undersized and would allow rain in. The solar panel wire has the built in seal that screws into the cam to prevent that. Would like to find the correct size adapter or wired plug that includes this screw in protecting seal/piece as well. Any help?