Finally installed the dryer vent kit today on my 3511DK. There wasn’t any location marked from the factory for it.
I gambled on where to put it. I put it front left corner of the garage and ended up right over the tie down. Measured six inches back from the wall and five inches up from the floor. Put the pilot bit of the hole saw on that mark. It was a clean install. Base of outer cover on vent sits right above the trim on outside.
Used a four inch hole saw just turned it by hand, probably could have used my cordless drill and went real slow but I already had a pit in my gut at the thought of cutting the hole in my new trailer.