Floppy spin up and recognised by the PC as 1.2MB unit, head moving but no further succes, most likelly jumpers are in no PC compatible mode.
Monitor switch off , no further test done.
As it looks like it use DB15 two line connector from the main panel.
The RGB connector serving unknown puprose, and if it is input then no clue how the V/H signal carried over.
Both floppy have standard PC connectors, but very hard to remove due to the configuration of the unit.
The unit is very heavy ,around 20kg.
See pictures for details please.