ML350 Gen 9 - Support for 30 Disks

Hi. 

I configured a ML350 Gen9 on SBW with 1x P840/4G & 1x SAS Expander.

When I added 3x 8 Bay optional drive cage

The configuration states it can support max of 32 Disks.

Question

1. Can 1x P840/4G & 1x SAS Expander support 32 Disks ?

2. I'm looking for the cabling guide where P840 first port will be connected to the SAS expander while the second port will be connected to the default 8 bay drive cage (via Y-Cable).

Thanks,

Paul