Ok currently using open vent(perhaps for an additional fan) panel on the open part. The other side has the panel without the single vent opening. For the life of me I can't remember if this is correct, got them backwards, or its up to personal preference. If I switch the panels, the closed side of the tower with the one vent opening is by where my motherboard+ processor location lines up with it perhaps for some air, extra fan. My question is should I used to closed panel side on the open side of my tower or not or doesn't matter//based on external circumstances, etc. Hopefully I worded this well enough for you to understand my situation.