I suspect you have the 4 chairs for the table - they just are strapped to the table center leg. With that said, since there are only the two of us, we put those extremely uncomfortable chairs in storage, purchased a couple comfortable $60 replacements at a discount store, turned the table 90 degrees and rescrewed to the floor and then just padded the chairs against movement. The two uncomfortable swivel rockers should each have a strap, a pair of rings screwed to the floor for each chair and are held in place the best way you can run that strap. If the dealer has 'conveniently' removed the straps, you can try to convince him he owes you 3 sets. Or you can go to your local big box store and purchase a couple of inexpensive ratchet straps. You may have to make up a loop of some sort for the rear most floor ring as the ratchet falls in the wrong place though. Oh, and our uncomfortable swivel rockers - in storage with those dinette chairs, replaced by some La-z-boy's which are very comfortable. As far as any dings or scratches, none in over 12,000 miles across some of the worst interstates and secondary's in the US and Canada.
Or as noted above, just let them sit free as we did on the previous 5er and those had no damage either though we did pad them somewhat with blankets and throw pillows
Dave W along with my DW, Susan and our poodlepups, Callie & Molly,2011 Ford F250 6.7 CCLB, 5er Hitch Option w/B&W Hitch,,Ride Rite air bags, 2014 Montana High Country 343RL (38')