Take the combination to a cat scale and get the three weights:
TV front axle
TV rear axle
Trailer axles
then drop the trailer and get(go in and tell them you want a reweigh of TV only.)
TV front axle
TV rear axle
You might want to go in and talk to them first before weighing if it is our first time.
https://catscale.com/cat-scale-locator/
Come back and post these weight above along with the TV front GAWR and rear GAWR, we ready see the TV 7800 GVWR.
I assume from your second picture, based on TV axle ratio it is rated for a 9K trailer and your Cougar has a 7800 GVWR. Chris