Inside the transmission. Most Honda transmission filters are non servicable. The transmission must be removed to change the filter. By the time the filter needs changing, the transmission needs rebuilding. Change the fluid and forget the filter.
The oil capacity for a 2000 Mazda Protege with a 1.6 Litre engine is 2.9 litres with an oil filter change ........... it is 2.7 without an oil filter change but who in their right mind would change an engine's oil without changing the filter is beyond me ??!!