Unless they've changed the design, it's mounted just like the one in your main room... using a rack & disc system. Pop it loose by simply lifting up, and then out. Here are some photos to help:
__________________
__________________
Tom
2013 VOLTAGE 3200 (EPIC I & II)
2014 Ford F-450 PLATINUM
2018 BMW R1200GS RALLYE
Exactly what Tom said is also how mine works. Easy peasy...
__________________
Chris & Donna
2014 Voltage Epic 3990, 600AH LifeBlue, 1895W Solar, 3K Magnum w/AGS, 3X Micro-Air ES
2018 RAM 3500 Laramie Sport Crew Cab 6.7 Cummins, AISIN 4X4 DRW 4.10 Long Bed Dually