Rough copy/paste from the notice. Pics didn't come through of course.
powerCON® TRUE1
Please regularly check the condition of your powerCON TRUE1 connector system (cable connector
& chassis) for clear signs of wear and tear.
Through improper use and the excessive use of force, the encoding lugs and guide slots in the connector system can become so severely worn or damaged that it is possible to insert the cable connector the wrong way. However, when inserted the wrong way, the cable connector should not twist-lock into place.
A cable connector inserted the wrong way could, in some circumstances, lead to contact between live wires and the grounding contact in the plug socket.
To determine that the cable connector is inserted correctly, follow the use instructions and listen for the “click” when performing the twist-lock. Immediately unplug any connector that does not twist- lock correctly in place.
ABC
Note: When connecting, match the notch on the cable connector to the corresponding guide slot on the chassis.
Note: After inserting properly as in illustration A , twist the cable connector clockwise to lock.
click
Note: The proper twist-lock is achieved when the yellow tab is in the position shown in C and an audibel «click» is heard.
SAFETY WARNING
incorrect insertion may cause electrical contact misalignment resulting in equipment malfunction and/or personal injury.
max.
1 Newton