We have made a change to the 906030 kit for the Toyota Sienna.
We redesigned the shock bracket to mount at the top of the rear shock, in response to feedback from the customers. See the photo for how it mounts to the top of the shock. This is a change from the previous mount location at the bottom for the shock extender.
And of course, if you are using longer shocks like the Monroe 37301 then you do not need the 906030 kit and should get the 906025 kit instead.