the tank is not opened. It had to be turned clockwise when viewed from the front of the motor to align with the screw hole. I had to cut a groove in the bracket so it could be bolted to the bracket. It had to be rotated 3/16" on the tank to align the bolts. Also the pressure line was not suitable as the outlet pressure on the back of the pump was for an inverted flare and not an o-ring type. This car has that. Had to remove the brass insert for the inverted flare and was able to turn it into an o-ring fitting.