Your 322 looks to be in good condition. The tender would have the smoke in tender motor driven bellows smoke unit along with a black tube to deliver the smoke to the engine stack.
As stated above, the brass buttons worked with the 695 Track Trip that was not put into full production. The brass buttons were deleted beginning with 1947 production. Below is the instruction sheet for the 695 as well a a picture of one. A few, but not very many were made.