In the 2010 video game Aliens vs. Predator (or AVP 3), when you have the the mines as the Predator, where would they be stored? Do they go on the belt? Because that’s the only place I think it could be.
After reviewing a video footage of the Predator emplacing mines, along with images of the predator sprites used in the game the only conclusion I can draw is that he's pulling them out of his "Hyperspace Arsenal".
There is literally no place he could hold a dozen mines, each the size of a can of tuna unless his rectum works in a dramatically different way to that of a human.