To go any further, we first need to move that nifty little Siri side button out of the way. Otherwise the power button will obstruct the tech sled and hinder its removal.
If you can pull off the power button beforehand, it might be enough to just slide the Siri button sled back to get the internals out. As always, service instructions would be helpful, if Apple ever decides to share them—for now, we'll have to work it out on our own.
Fussiness aside, this should still prove easier to reassemble than something that was glued together.