Welcome to the forum.
Many coach's have a platform on a slide whats on them can be removed and screw with clamp for hold down thru carpet to wood floor on slide with no problem.
Here is
a thread on different slides there operation and possible problems they may have.
This link covers many more items of 15 years of collecting for reference and links below in my signature will cover many items in older coach's of 90's & early 2000.
Good luck in your hunt for a Newmar.