I am not sure that the Silverbacks and the Cedar Creek units are the same in this area.
My Cedar Creek has a exhaust vent for the microwave exhaust fan; but there is no-way that the vent can be opened from the ground. I am 6' and I would need a 4' to 5' step ladder to reach this vent to open it every time we where to use it camping. I checked out the vent at home and the top of the flap opens to allow exhausted air to escape. The vent opening was similar in opening area as my older camper exhaust vent was.
On my unit it is brown in color and about 10' to 11' off of the ground on the street side of the unit. If you have a propane/electric refrigerator this would be next to the heating exhaust opening for the refrigerator but up higher.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67