need some help

[freshead16]

So im terrible at guitar terms and dont exactly how to explain this correctly, but the part you plug your guitar cables into? The end jack on a acoustic electric is coming out. ITs done it before and i took it in to get it looked at. The guy said it would be like 60 bucks or something. It still works and everything when i plug it in but its coming unscrewed. I fixed it the first time on my own and i dont remember what i did. I think i just need to screw it in from the inside. But just wondering your guys' thoughts. I hope this made sense? thanks for taking the time to read this.

Micah Jon