A cassette including a first end having a first geometry symmetrical, about at least one axis, to a second geometry of a second end. A first connector fastening station arranged in the first end of the cassette and including a first plurality of receptacles, each of the first plurality of receptacles configured to fasten at least one of a first connector, a first adapter, a first plug, or a first strain relief unit. A second connector fastening station arranged in the second end of the cassette and including a second plurality of receptacles, each of the second plurality of receptacles configured to fasten at least one of a second connector, a second adapter, a second plug, or a second strain relief unit. The first plurality of receptacles of the first connector fastening station are symmetrical, about the at least one axis, to the second plurality of receptacles of the second connector fastening station.