Ring power adapter not connecting

I recently purchased a Stick Up Cam Plug-In and I’m having issues with the outdoor power cable adapter. The instructions state that this outdoor adapter is supposed to click into the power cable, like the indoor faceplate plug, but they aren’t connecting. Looking at the outdoor and indoor faceplates, the connections seem to be different where the indoor connection (on the left) has a cutout for the power cable connection and the outdoor connection (in the middle) doesn’t.  My guess is that this is the reason for the outdoor adapter not connecting properly to the power cable. Is this how the connections should be manufactured or am I missing something?