We had inquiries about our Safari style tent units about what certain straps are for; particularly those that attach to the platform hinges and Velcro to the mattress by the door. The reason for these is to aid in steadying yourself as you climb in and out of your tent unit. For trailer top applications, I seldom use them, although when rooftop I like to use them when climbing out.
Whether or not you plan to use them, be sure to attach the straps to the velcro strips on the mattress cover by the door. The reason for this is, the door screens won’t get snagged by the Velcro