I’d go ahead and run 10 gauge wire from the batteries to a separate Blue Seas fuse block. The Livescope module is power hungry and some have had problems due to insufficient voltage to the module and graphs.

I just installed a Garmin 106 Ultra and a Livescope module and I put the fuse block and the module in the starboard storage locker. I’m powering my bow graphs and the Livescope from the new fuse block.