July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Lower Module Removal/Installation: Notes

Disconnect the negative battery cable.
Remove the audio unit. (See AUDIO UNIT REMOVAL .)
Remove in the order indicated in the figure.

Fig 1: Lower Module Removing Sequence Index
Courtesy of MAZDA MOTORS CORP.

Fig 2: Removing Lower Module
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.