HUGE kudos to WJColdWater!!
What a fantastic tip!!!! Just got mine.
Some quick measurements for others-
These are good starting points that I used. There is room for adjustment if needed. Mine took none.
Put some masking tape in the corner. Measure up 60mm or 2.36" (about 2 & 23/32") from the black trim on the cover with the lid closed. Thats the top edge of the ball from the hinge center, for
height on the upper mount ball.
Measure 28/32" from the back wall. Thats the edge of the upper bracket you attach to the lid. This will allow the upper bracket bracket to clear the framework of the storage compartment when you close the lid.
Install the shock on the upper ball mount on the lid. Install the lower round ball mount into the shock. Hold the door open and measure 28/32" down from the opening for the round lower ball mount.
Mark the upper hole location. There are 3 holes, pick any one with one being straight up. Remove the lower ball mount from the shock with a pocket screwdriver.
Drill and install the top screw for the lower ball mount. Let it hang and drill and install the other 2 screws.
I rate this a 2 beer job.