It is good practice to +ve power supply (Red or Brown wire) to terminal 1 -ve power return (Black or Blue) to terminal 2
It is however best practise and essential when working in damp environments to achieve our IP65 rating that the correct size of the cable into the conduit entry is achieved so that the rubber grommet fits firmly against the external cable sleeve to prevent water ingress into the connector.
Also ensure correct fitting of the gasket between the connector and the coil with correct or adequate torque
It is also important as correct sizing and fitting not only protects the electrical system but also everything and everyone around the connector. Keeping the circuits safe, dry and helping to keep the cable securely fixed in place.
Make sure the cable conduit entry is facing down and that the electrical cable has sufficient slack in it so that it drops under the connector and back vertically up and into the conduit entry of the plug. This will help prevent water ingress into the connector keeping it safe and water droplets will fall away from the conduit entry point.