Rear brake caliper on 2005 trx400es h

hi

I replaced pads but there’s a plate on the side of my brake caliper that has a thin metal finger bracket on it (looks like some setting) and the plate is in the way of allowing me to get the pads over the rotor. I did replace the rotor with a brand new one as well..the plate looks like it can be adjusted but not sure what it does and if it can be adjusted? Any help is appreciated. Thanks!