This reminded me, Murphs fuse block takes the extra load out of the J Box, as it draws 'switched' power directly from the battery, not through the J Box, which is a known weak point of the Connie electrical system.
Actually, unless you've modified the alternator wiring, all charging to the battery runs through the J-Box (which includes the current load demanded by any accessories connected directly to the battery). This is clearly explained in schematics that Slybones has posted on his webpage in the alternator upgrade section.
BTW, I'm pretty sure Murph does Not claim his kit removes the load from the J-Box.