Here's a full breakdown on how I set up my electrical system. Started off with the 12v system for lights, bilge pump, livewell, and then I set up the 20v Seelite system for the Garmin and Livescope.
Time stamps:
0:00 - 33:30 12v system
33:30 - 46:57 20v Seelite system
46:57 - 53:13 finishing touches

Links to products used: