No....the crack on the fender is because someone used a flanged bolt (wrong fastener) and has it rigid mounted (which may cause it to crack) and the rubber washer designed to allow flex in the mounting point, and the fastener is missing
Following the manuals instructions on the front wheel install, was not what I was referring too, and will not correct the issue I'm pointing out.
The spools, are the floating buttons that hold the rotor to the rigid mount on the wheel. When they get dirty (brake dust) they bind, and can cause several issues, from brake issues, to handling issues etc.
Its a 10 minute job to fix that.