How to check instrument cluster plugs?

I'm getting warning lights and sounds when I push the dashboard around the instrument cluster.

I'm experiencing the same issue when pressing brake pedal hard whilst driving.

I imagine it can be caused by instrument cluster plugs not connected correctly.

How can I access those plugs? Anyone knows how to get there without hurting my Octy?

Step by step guide or photos much appreciated.

Any other ideas what might be causing this issue?