Ring solar panel wire

I have Ring Spotlight Cam connected to a Solar Panel. I installed this 5 years back and it worked great. Last week I noticed the wire has been cut off or broken. So I decided to get a replacement cable from Amazon. When I tried to install the cable, I realized the cable is hard-wired into the solar panel unit (see pic). Does this mean I have to replace the panel completely or should I be removing the screws and go under the hood and add the wire from underneath?