Ensure wire are stripped by 0.5" (13 mm)
Insert wire into the red connector
Push the wire slightly to the side
Insert the hot wire in the gray slot of the posi-tap connector
It is generally easier to connect the gray connector first.
Hand tighten the connector the grey connector by hand
Insert wire into the red connector
Push the wire slightly to the side
Tighten the connector
Test the connection by slightly tugging on the wire