Interpreting two wires on 1 pin within this diagram
This is another logical equivalent using a different level shift and grounds and other variations are Ok since there are extra common pins.
The physical wiring may be solid or stranded AWG24 but should be robust with minimum exposed conductors unless you intend to poke them thru a couple mm for test probes.  Strain relief is often done to protect fragile connections from fatigue after several bends.
Learn to solder by pre-tinning contacts at both ends so the contact solder joint time can be done in less than 2~3 seconds to avoid stress on plated thru-holes to pads.