Refer to the exhibit.

You are managing a FortiSwitch 3032E that is managed by FortiLink on a FortiGate 3960E. The 3032E is heavily utilized and there is only one port free.
The requirement is to add an additional three FortiSwitch 448E devices with 10Gbps SFP+ connectivity directly to the 3032E. The plan is to use split port (phy-mode) with QSFP28 mode to connect the new 448E switches.
In this scenario, which statement about the switch deployment is correct?