If you fused the negative side of the cell, then you wouldn’t have to worry about the fuse digging into the cell casing and causing a short. (Because the outside layer is negative)
Also, I see you’re using hot-glue for insulating those fuse connections.
If you’re pulling a lot of amps from the cells, then those fuses are bound to heat up a bit, and that could melt the glue away, making it pointless. (Or vibrations will simply kill it) Please use some normal heat shrink instead, and use kapton tape to stick the fuse flush to the cell.