OK so I completed this yesterday. First off, thanks for what was posted previously - it at least got me started. Disconnected the front connections (as others suggested I used the front green clip for practice bc there is one on the back of the purge valve that you will also need to disconnect). Undid the four bolts - these are for two brackets, not just one. Struggled thru getting the back part disconnected. Then I figured out that the back connection was also linked to this part circled in red:
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If you unclip this from its holder and unclip it from the purge valve (clip circled in red), it allows you to more easily access the back connections. I fed it under some of the tubing and pulled it up to where I had unlimited access to unclip the wire harness and the green clip. Two hours, bloody and nasty hands, and multiple beers to get it out, 10 minutes to put it back together.