The fill/check location is the square-holed, 1/2" pipe threaded plug on the front face of the MTX case about. Just jack up and jackstand the front of the car to allow you to slide under far enough to get a 3/8" socket driver with 3" extension into the square hole. Configure a funnel and long tube into the open fill hole and lower the car to normal ride height over a catch pan. Add Type F or MERCON ATF until the fluid runs out of the fill hole. Lift the front end to allow removal of the tube and reinstallaion of the teflon tape covered plug.