Here is some information on standard ICE options for Daihatsu models
Sirion M100/M101
Front door speakers - cutouts present, suitable for 6.5" speakers. Adapters required for DIN speakers. Stock cutouts 3x crosshead screws at 120 degree spacing.
Rear door sepeakers - cutouts present, suitable for 5.25" speakers. Adapters required for DIN speakers. Stock cutouts 3x crosshead screws at 120 degree spacing.
Wiring tails present on the door loom ends for 2-way speakers only