It is not a parking lot but a row in the parking lot. It is up front right behind or next to the handicap row.
There is no guarantee of a spot. If it is crowded and the row is full, you are out of luck.
Unfortunately, it is not serviced by the trams so, even though it is close, it is a walk. For example, at Epcot, the row is all the way on the left. So you end up walking the entire width of Epcot to get to the open turnstyles (which are on the extreme right.
Ed