How to mount children's bikes on a two armed adult bike carrier / bike rack

I purchased a Yakima RidgeBack 4-Bike Hitch Rack from Amazon. It works amazingly for my adult bikes. However It's difficult to mount children's bikes. In this video I show you how you can use a ratchet to create a horizontal tension bar between the seat and the handle bars so that you can mount it onto the rack. This Creates a top tube for non-conventional frames.