mine where leaking as well
I found the small spot welds on the inboard edge of the corner had blown thru during the welding and it was letting water blow throw in the rain
I also added a pair of small rubber deflectors that mount 3" up from the lower edge and hang down about 6"
it appeared on mine that the water was blowing through that lower sealed edge
so it got goooped and then a rubber cover that was also sealed
I haven't had a Rainy day yet to check it
i may be NUTs but i pressurized the basement with a blower fan taped to the sewer hose pass thru hole I used a bilg blower fan i had laying around.

this provided a large volume of air to the basement.
i also had to tape off the heater vents inside to stop the air blowing up through them
it gave me enough positive pressure to see bubbles when i sprayed the areas with soapy water
it was red necked but it helped me find suspect areas.
when we get home i will snap a pic or two