The closing loop is routed through the grommets and held in place by the pin.
Most newer containers use stainless steel grommets.
These grommets are slightly harder to set. Inspect the grommets for complete setting. They should be very snug against the material. If the grommet is not set completely a suspension line may snag the edge of the grommet. This could cause a malfunction and may prevent the main from separating after a cutaway.