[ChevLoRay]

By design....but, you can adjust them (and you should) before putting them into service. The adjuster is at the bottom of the backing plate. There should be a knock-out on the backing plate to allow you to insert a brake spoon. But, it's tricky. You also have to insert a small diameter screwdriver to push the "lock" away from the star wheel on the wheel cylinder.

Seriously, you need to look for some video that someone has posted to watch. If you have never done drum brakes before, it would be a good thing to have an experienced person on standby. If not, and if you have any reservations....have 'em done.

This is one of those jobs that is easier to do than to tell how to do it.