I installed the OEM rear speakers this weekend and thought I would post pictures. It took less than one hour to do both sides with the most difficult part was trying to work in the limited space behind the seats. It would have made it much easier to remove the seats but may have taken a little longer. Tools required include a pen or marker, a phillips srewdriver and a razor blade or scissors.
Picture 1 is the stock cargo area with no speaker:
Picture 2 shows the template provided by Honda indicating the speaker position.
Picture 3 shows the location marked by using the template.
Picture 4 shows the carpet cut away with the underlying insulation.
Picture 5 shows the insulation cut away revealing the plastic speaker hole cover.
Photo 6 shows the plastic cover removed.
Photos 7 shows the plastic cover removed and the speaker connection located.
Photo 8 shows the OEM Honda rear speaker kit.
Photo 9 shows me inserting one of three plastic screw receivers.
Photo 10 shows the speaker receiver placed over the hole.
Photo 11 shows the speaker installed with the provided 3 screws.
Photo 12 shows the grill snapped in place.