Replacing rear brake pads

I need to replace my rear break pads on my 2001 volvo. I already have the wheel and and loosen the bolt for the caliper but it just keep on turning. I tried to tighten it and it keeps on turning also. Any suggestions on how to replace it?

I need to replace my rear break pads on my 2001 volvo. I already have the wheel and and loosen the bolt for the caliper but it just keep on turning. I tried to tighten it and it keeps on turning also. Any suggestions on how to replace it?
The rear calipper have the Hand Brake cable. To remove de cable you need to release from the hand brake stick.