On any car, they are usually in the center of the floor pan on each side and front and back. You will have to remove the carpet to get to them since they are put in from the inside. You should be able to look under the car and find the plug in each spot. About a 1 1/2 inch circle.
Leakage in weatherstripping
The 2006 Mazda MX-5-Miata has 16 valves.
The 2006 Mazda MX-5-Miata is a gas-powered vehicle.
The 2006 Mazda MX-5-Miata has an inline 4 engine.
The 2006 Mazda MX-5-Miata has a 5-speed manual.
The 2006 Mazda MX-5-Miata has double overhead cam (DOHC).
The 2006 Mazda MX-5-Miata's turning circle is 30.8 ft..
The height of the 2006 Mazda MX-5-Miata is 4 ft. 1 in. (49 in.).
The 2006 Mazda MX-5-Miata is 13 ft. 1.3 in. (157.3 in.) long.
The curb weight of the 2006 Mazda MX-5-Miata is 2441 lbs..
A floor drain , drains water and other liquids that spilled on the floor
The gross weight of the 2006 Mazda MX-5-Miata is 3078 lbs..