Simple Wired Remote 5D3?

[AnotherDave]

Hey,
So I just happened to find this video of a guy who built a wired remote for his t2i, and I didn't even know this was a function on Magic Lantern.

http://www.youtube.com/watch?v=KsX60f_cdK0

Would it be possible to use this on a 5D3?  I have a right angle HDMI that blocks my regular 3-pin release port, so I've been interested in finding another option..

Thanks.