Here is a link to the photos of my Job 225's fuse holder. Hopefully this will be clear once you see where the fuse goes inside the amp.
http://audioshark.org/amplifiers-8/pictures-job-225-fuse-replacement-2990.html#post37067
http://audioshark.org/amplifiers-8/pictures-job-225-fuse-replacement-2990.html#post37067