I have a 2013 351 -- It actually has a little metal piece that is used to hold up the "hood". It is on the drivers side.
I bet you have the same thing. Look for a piece of metal that looks like it is part of the scissors. On the inside of one of the joints you will see a piece that has a round notch. Slide it down (or up, i forget), then push it towards the centerline of the RV and put the notch on the round crossbar. That will hold the hood up.
Sorry, but I don't have any pictures.
2013 Georgetown 351
Much more significant other....
2 Kids and a dog that rules!