This is a prime example of the issues are skilled engineers face on many calls to systems not originally installed by ourselves. In this case you will notice no cables are marked as to where they originate, and as the cables are ‘Birdsnest’ like. If a cable becomes dislodged it can take a considerable time to trace where it originated.
The entire base plate was returned to our workshop and given a workover to allow swift and easy fault finding in the future. all cables were traced and clearly labeled for ease of identification.