In my SIB, the anchor and cable are in a holdall.
If you don't have an anchor locker (Searider eg), then the seat pod may be a good place to store the anchor & cable. I've seen them kept in old cut down blue barrels, plastic crates, etc.
I think Parkesey uses a lumberjack's padded rope sack.
Best advice is to keep it somewhere secure & accessible, where it won't land on your foot. You wouldn't want to injur your other foot kicking it out of the way.
If you ask Matt h nicely, he may share/sell the copyright to the design of his SR54 Anchor Locker Modification.