I don't think U need to tap the pan at all.
The adapter will replace the spin-on filter. 2 hose comes off the adapter.
Only 10% of the oil will goes to the high filtration filter 2 microns.
The rest goes to full flow. I think the problem for Mazda 3 is room.
However, looks like there are lots of room in front of the dash board.
I am not sure if the hoses will interfere with anything else.
If somebody has done it. then it would be easily.