Nice job. I have been thinking of doing something similar for a long time. It's very nice to see it done and I'm a little surprised that there are only 12 connectors. My wife got a new Dymo Labeler for Christmas. She saw your pics and she is even excited about helping with this project. She loves to label stuff.
I was thinking of going one step farther and using a covered fuse block (I realize the fuses aren't necessary). Something like this one but I would like to find one that uses ring connectors instead of blade connectors and the connectors covered as well:
http://www.amazon.com/10-section-ATM...686898&sr=8-30
I also like to use these heat-shrink connectors:
http://cgi.ebay.com/3M-HEAT-SHRINK-R...item3a61851772
It would be easy to put a clear plastic cover over one like yours, using the mounting screws on each end to secure the cover. I would just be a little concerned about all those connections being exposed.
I may have to re-think the "fuse-holder" and look for a terminal block like yours.