Adding widget from my mod to existing blueprint UI

This is probably a really dumb question but I am creating my first mod for a game called Insurgency Sandstorm. What I want to do is add a key bind option in the existing settings menu and they have an event that fires after the settings UI loads in and they have some widgets setup that easily allow you to throw a new key bind setting in. I can create a blueprint that parents in the key bindings menu blueprint and add a key bind option widget on a separate UI but adding an option to the existing menu is seemingly more complicated. I’m going to assume this is by design. I’ve read about blueprint communication and fundamentally understand interfaces and events but I imagine if they didn’t create a method to manipulate the settings from the source I’m SOL. I am a web developer so this is a little bit different territory then I’m used to so I apologize if this is super dumb!