My 251BH has a mount above the dinette on the bathroom wall, in the bedroom on the opposite wall of the couch, and one next to the bunks.
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2013 Z-1 251BH | 2011 Nissan Armada | Curt WD hitch with no sway control 2014: 20 Nights & 1338 Miles 2013: 23 Nights & 1200 Miles 2012: 10 Nights & 254 Miles