Sieg X3 Fuse Holder

I have a Sieg X3 mill and the 5A glass fuse has blown. The fuse is located above the speed and direction controls on the main column. The fuse is beneath a slot head black cap. Poking a slot head screwdriver into this got the fuse out, but now I've replaced the glass fuse in the holder, I can't get the assembly to stay in place in the mill body. How is it held as I can't see any kind of fixing on the holder? I attach some photos of the holder and fuse.
Thanks.

Dave can you repost the pics nothing has come through on your post.

If we can't work it out I may have some holders I can post to you...