Bump and a correction.
The larger bag is a Peak Design Field Pouch. It fits on a belt with belt loops, or can be used as a shoulder bag, with the peak design pucks and belt - but the belt/pucks are missing
The smaller bag is a Maxpedition pouch, not a Peak Design. It uses the Molle system, to attach using the included Molle stick, or can be attached to a belt with the Molle stick.