Ron, if you are planning on an articulating arm, you can mount it to either side cabinet wall. Those walls are structure wood. Basically a laminated OSB. You could bolt directly through the side or use longer wood screws and go into the cabinet framing. A couple of pics are attached of ours. A different location but the same end result. When traveling I have a strap that keeps the TV in the corner. This mount style also allows very easy access for attachments.