Newbie here, help please! (with pictures)

[Thea]

Sure, trim it if you want it to fit in that bag. If re-giving the “meat glue” on the surface, prepare a clean surface with parchment or foil, run tap water over the the meat, rest it on that surface for five minutes or so, fold back the opening of the bag to prevent contaminating the seal with fat or protein, insert meat and reseal.