So i'm planning to install the brake caliper that came with the sidecar. It wasn't installed when i bought it but it does appear that it was installed at one point. My issue is that it appears to be missing something. I'm not sure what it is. Also can anyone identify the brake caliper? Here are the pictures of the caliper: Here is another part of the caliper. Not sure what it is: It looks like it's missing a piece. Can anyone tell me how to secure it. I circled the area that I believe is missing a piece. Any help would be greatly appreciated.