If you wish to use PoE with the Indoor Hotspot you will require an active PoE splitter that outputs 12V to the unit. Alternatively, you can use passive PoE adapters as long as the power provided to the unit is between 9 and 16 Volts and can provide 15W of power.
Step 1: On 1st gen design (dark grey case with white logo) - remove the screws from the bottom of the case to take off the lid. On second-gen design (gloss black plastic case) - unclip the lid from the base (there are 4 clips, one in each corner).
Step 2: Re-insert the daughterboard into the 60 pin header and then reassemble
That's all, you should be good to go.
Here's a short video showing you how to re-mount the daughterboard...
At the side, it has two little metal clips, pull these out a little bit to release the compute module, you can then put it back in at a 45-degree angle, as far as it will go in, and clip it down into the clips again. most of the "gold fingers" on the compute module should not be visible and the sides should click into place.