It looks like the TV mount used is a Kebloc mount from looking at pictures.
I wanted an outside TV mount for our new Eagle TT and bought 2 Kebloc's and a corresponding tilt/swivel mount so I can move a TV between our bedroom and the outside.
I bought a Visio 39" LED TV (D39h-D0) and with it weighing almost 14# and adding the weight of the compatible metal tilt/swivel mount, which is solid steel and weights another couple of pounds, the mount holds everything just fine.
Oh, and I take ours down off the Kebloc mount in the bedroom and lay it screen side down on our bed during transit.
Here is the manufacturer's website. They should be able to answer any questions you have if Jayco can't, or you don't get any documentation.
https://www.lw-eng.com/categories/1/KeBloc-Products
HTH,
J