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but of course the legs extend...
http://vod-icbu.alicdn.com/oISZ6O0NbfRvfuD68Az/cPds7AVt6Iprysq3yJY%40%40hd.mp4
...well embedding a video quickly is clearly beyond me.
But the search term you want is pocket compressible corrugated extendable tube hose. No idea if you can get it in tiny diameters. But you could then use these
to run cable ties and secure the piping to the back of the right leg.
I was going to suggest attaching the extension to the table leg to hide it, but of course the legs extend...