The cabinet location and attachment varies with model, year & floor plan, so you need to be more specific. For example, on my 2004 40V Tradition, the cabinet was one long section from just left of the sink to the end of the countertop, with the microwave mounted over the stove. Yours apparently in in multiple sections.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL