It seems the only information on repairing these is for the gen 2 version unless I've just overlooked anything so I figured it's worth sharing a couple pictures. They go together the same as the 2i2 gen 1, with two plastic clips on the back of the faceplate.
Here's your reminder to check the easy stuff first. The solder points on the headphone jacks look perfectly fine, the tabs inside just needed to be lifted slightly.
Here's your reminder to check the easy stuff first. The solder points on the headphone jacks look perfectly fine, the tabs inside just needed to be lifted slightly.