You may want to consider the following approach to this situation.
For a 60 cavity "fuse box" device;
A. Create the 60 cavity connector (comment) symbol
B. Create the 60 cavity connector in Component Maintenance
1. Include on BOM
2. Associate with connector (comment) symbol
3. Develop component information as required
C. Create an electrical symbol for the "fuse box" device
1. 120 pins (all external)
a. 60 pins named to match the associated "connector" cavities
b. 60 pins for the "plug-in" devices (fuses, circuit breakers, relays, diodes, etc)
i. grid locations to match existing electrical symbols that will populate the "fuse box"
c. Add Internal links to pair the pins
D. Create the "fuse box" device in Component Maintenance
1. Do not include on BOM (uncheck box)
2. Associate with the (electrical symbol)
3. Develop Footprint(s) to associate device with the 60 cavity connector
a. Match connector cavities only
Assuming you already have the "plug in" devices in your component / symbol / analysis libraries, you will now have the necessary "ingredients" to develop the electrical design. Simply drop in the "fuse box" device, generate harness connector(s), and "plug-in" the fuses, circuit breakers, etc.
1. Multiple electrical symbols/devices may be required to support your required "fuse box" configurations. Each configuration will utilize the same connector footprint(s).
2. Cavity plugs may required to avoid incorrect component "plug-in"
Hope you find this information helpful.