IIRCC, you have to be very careful, squeeze correctly on both sides simultaneously, and then only move the small green plastic bit...just a little. It should remain attached to the body of the contraption, or it becomes a one-way ticket.
Here's...
A note on the evap line clips (green vertical clips) - only loosen to halfway. If you push the clip further one of the legs will break. I was unable to find just the clip available for resale.
Replaced a fuel pump recently as part of resolving an idle fuel pressure issue. Diagnostic thread here:
https://forum.ih8mud.com/threads/p0171-system-too-lean-fuel-trim.1289672/
Didn't find much documentation on this site so here's my attempt...