If your Security + 2.0 door opener has an eserial terminal (common outside of North America) connect the red/ctrl wire to eserial and not the red terminal. Only connect the black obstruction sensor wire if you have obstruction sensors.
Security + 1.0 & 2.0 openers using passthrough ports on control board (one wire per terminal): v2.52 & v2.53 (North America)
Rest of World Security + 2.0 Openers with e-serial terminal. Leave black obstruction wire disconnected unless you have obstruction sensors.
Security + 1.0 & 2.0 openers with multiple wires sharing a terminal on GDO:
Suggested Mounting method using a zip tie to secure the control board to the plastic light shield:
Example wiring for a Genie opener which has user accessible limit switch terminals: