Guessing you'd need some sort of filler or platform to fill in the opening between the two sections of the lift? I know they make drip pans for them. But I bet they also make filler panels? Then you'll likely need several d-rings attached to the lift to secure ratchet straps to. I hope you can find fillers made from aluminum. Steel would be very heavy. I use Rhino soft ties to secure motorcycles to the floor d-rings in my enclosed trailer. Get a bunch of them.
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio