Mystery interior piece what is it for? 2018 Yukon

[JJ1971]

Does anyone know what the purpose of this thing is? 2018 Yukon behind the second row seats. thank you.

 

[PG01]

Seat belt hold back for young children…. Owner manual explains all….. no excuses… i don’t wanna hear that ‘it didn’t cone with one’ ….they are available free on line…

P.S. im a f’in wise a$$ ….. fyi

 

[91RS]

It holds the seat belt in the correct place on the shoulder for children or vertically challenged people. Looks like it’s broken.