I had it rigged up this way for a while, since my console graph was the only one capable of running it.
My boat doesn't have versatrack or anything like that in it. So I just popped a few rivnuts in the gunnel and built a small pole mount with a wing bolt to attach it. I had 4 places along the starboard side that I could mount the pole, although I used the one right beside the console 90% of the time.
It worked fine. Occasionally I would be in a situation that made it difficult to fish with the starboard side facing whatever it was I wanted to fish. Wind made it even tougher since the boat tends to swing side to side.
I think it is best mounted on the front since you have the most control over the bow with the trolling motor up there, and you can fish a much wider area than on just one side.