(Not counted in the hours today: watched several EAA videos about registering an amateur build airplane, process for getting an airworthiness certificate and wiring. One wiring video said not to crimp more than one wire in a terminal.)
Researched question about terminating more than one wire in a terminal and found a document created by Bob at AeroElectric Connection showing an example of multiple wires in a ring terminal and a splice. Found a Garmin G3X wiring video that showed using three wires in a splice connector.
Made a table of AWG wire sizes and copper cross sectional area to help me understand what combinations of wire I can crimp in different terminals and pins.
Continued considering options for putting a bulkhead BNC connector on the panel from the COM antenna. This would allow connecting either the GTR200 COM radio or a handheld if I needed to connect it to the external antenna in an emergency. Found BNC bulkhead fittings to use for the COM and NAV antennas. Made inkscape labels for the panel mockup and tried a few locations.
Looked up temperatures to use for installing heat shrink tubing.