Our TT came with a single propane tank. We wanted a second one as we use one for our camp stove, lantern and Weber Q, and want to leave one on the trailer for the trailer stuff.
I made a "box" out of 3/8 alum. which is about 1/8" taller than the frame The box fit where the single propane tank lived. Bolted the box to the existing angle iron from underneath. I purchased a dual tank holder like this: https://www.amazon.com/Flame-King-KT...70_&dpSrc=srch
I know the moderators are busy and working hard. Posting pictures seems a bit difficult. I'm used to looking on my computer, selecting a picture and posting it. Asking for the http:/ makes it cumbersome, at least for me.