I suppose in a really odd way it could be used to allow filling and draining in a system (just follow me here....it might actually happen!!)
You could put the cross piece somewhere in the system, and use it as a through piece, then have one side going to the top of the case for bleeding, and the other side going to the bottom of the case for emptying the system.
I suppose you would have to add in a couple of valves to get it working properly, so it is probably easier to do it another way.
Hell if all else fails i suppose you could just glue 20 or 30 of them to the front of the case to make a pretty pattern *grin*