But not sure if you can have that many on one connector.
The floppy I believe uses 5v and all the other drives are 12v
You must use the floppy connector only for the floppy.
A good config would be
I cable for 2x HDD + splitter for graphics card.
1 cable for optical drives
Use cable ties to tie them all together neatly and push them as far back in the case as possible to optimise airflow.