looking at (3) new Lifeline GPL-30HT batteries. 150Ah and 100# each. In my configuration of the House Bank and the molded battery tray, which is glassed to the hull in the V-berth (my boat is bow light so not a problem), these batteries would best fit if on their side, the short side, so that the terminals are up & down, not fore & aft. The literature says you can mount the Lifeline in any position except upside down, is this really true ?

thanks, cheers, John