Thanks Oliver for this extremely helpful response. I was wondering why the power was not coming on. I didn't want to force it so hadn't managed to get it working until I did this.

The only way I seem to be able to connect the cable is to have it squashed hard up against the door to the unit. This will not last more than a month or two. Am I connecting it incorrectly or do I have the wrong cable. https://www.jamesstewart.photography/wp-content/uploads/2024/02/Unleashed-Cables....