If all those terminals are 12VDC positive, you don't have to worry about shorting any two of them because something was dropped onto them. That being said, I wouldn't want a strip of positives uncovered. If somehow one (or more) got shorted to ground (like at that grounding block I see mounted nearby), at least it would blow fuses or melt wires, at most it would catch on fire and probably do considerable damage. There are plenty of insulated terminal strips out there, get one and use it. The one shown from Radio Shack would work just fine.
Steve and Tali - Dogs: Reacher and Lucy and our beloved Storm and Maggie (waiting at the Rainbow Bridge)
2008 Outlaw Oliver Legacy Elite & 2014 Outlaw Oliver Legacy Elite II
2014 GMC Sierra 6.2L Max Tow Pkg 4X4 Crew Cab