HP Proliant DL380 GEN9 2nd Raid Card

[CAPONE1]

We are having raid performance issues on our HP Proliant DL380 Gen9 server with the P440ar raid card PN 726736-B21. So i would like to install a 2nd raid card to move one of our SQL servers onto a new raid built with SSDs. I'm looking at ordering the HP P440/4GB FBWC 1 port SAS controller PN 726821-B21 with 6 of the HP 400gb 12G SAS Mainstream Endurance drives PN 741142-B21. 

From what I've read both of these should work with 2 raid cards in the GEN9 server. The problem I'm having is I think I need to order some type of tray that the 2.5" drives actually sit in and that connect the drives to the server.  So basically two questions?

Do I need to order cables or will the new card come with that? 

Do I need to order a hard drive backplan kit? It looks like this could be the correct part? 719067-B21 or 768856-B21..

Am I missing anything else required to get this setup? 

Thanks

[Krishblr1]

This question need to be answered by the HPE Pre-sales team.
I would recommend to contact nearest HPE pre-sales office / team.

Since the DL380 Gen9 Server is already working and need configuration changes.

The spare part number will differ when there is configuration changes, It depends on number of hard drive already installed. and number drives that are going to be installed.

Hence please contact HPE Pre-sales team.