Your trailer should have 4 14x14 roof vents. One in the rear living room just forward of the recliner location, one in the galley where the OEM air conditioner is mounted, one in the bathroom over the toilet and one in the bedroom, just forward of the ceiling joiner strip and "sort of centered" between that joiner strip and the "wood decor strip with COUGAR carved in it. There is also a 16x30 "skylight dome" over the shower.
On the Cougar XLite series, the front cap extended back "almost to the bedroom window" and the joiner strip between the front cap and the TPO roof membrane was only about 12-18 inches forward of the bedroom 14x14 roof vent. That locates the roof vent "on the down slope" and it will "open up toward the sky". That vent "should match the vent in the living room and the bathroom in style and function"...
If the bedroom vent is different from the other two, I'd suspect that there probably was an air conditioner in the bedroom vent which was either removed by the owner when he traded it in or that stopped working and someone (previous owner or RV dealer) just pulled it and installed a vent in its place rather than install a more expensive air conditioner unit.
But, yes, that forward vent is "almost 25 or 30 degrees toward vertical" (or so it seems) and I've always considered that an air conditioner in that hole would "skid off the roof on a big bump"... Our Cougar 27RKS bedroom roof is the same "footprint" and our bedroom roof vent is similar. It does not "scoop rain water" when closed, but will not keep rain out if the vent is open while it's raining.
Here are some photos of a 2018 SGS that I got off the internet that show the OEM location of the roof vent.
