I beleive theres there's a nut on the bottom side of those bolts. It should be secured but i know i only have 1 top bolt cuz i lost a nut during tank removal one time. It's possible maybe those nuts are spinning even tho they shouldn't be. Also the trick with removing the gauge is i wiggle it up a bith the reach under and unthread speedo cable from gauge. Then u can lift it enuff to disconnect the electrical plug. Some people disconnect speedo cable down at gear to lift the gauge enuff but I've found i can get it up at the gauge, used long needle nose the first time and it's only been reinstalled finger tight ever since.
07 vstar 650 midnight custom
Ais disable, 4.5 inch risers, V&H cruzers, jetted with pods, viking saddlebags, Kuryakyn mini boards and memphis fats windshield, fuel solenoids deleted, star solo seat and 4 inch extensions. Boss audio sound system.