While I try to clean up the cabinet, a few more images:
The cabinet's rear portion comes off easily after unscrewing the two Torx 20 (ish) screws at the bottom rear edge of the cabinet and giving the upper edge of the rear portion a push. There are three plastic extrusions on each side that hook onto cutouts on the cabinet wall. The perimeter of the rear shell is lined with rubber. presumably to improve the seal between the rear shell and the rest of the cabinet. You can also see the glued-down screw holding the heat sink on the opposite side of PCB in place.
Disconnect the larger 4-pin which goes to the driver as well as the smaller 3-pin which goes to the LED, and the rear portion detaches from the rest of the speaker.
There is a big fat foam chunk of sorts behind the tweeter driver which also helps the cables stay in place. The cabinet is, of course, made of PC plastic but they have a nice thickness to them and are fairly rigid. There is a strut in the middle of the speaker presumably to reinforce its structure. There are only two types of screws in the kh80: One is a Torx T20(ish) M4 screw that holds the drivers, the port, the strut in the middle of the cabinet, and the rear shell of the speaker in place. The other is a Torx T10(ish) M3 screw which is used to affix PCBs to the speaker.
The port tube is of a curious design - There is a small hole in the middle of it blocked by the same material which stuffs the upper part of the cabinet! I'll leave it to someone savvier in these things to explain this.