Cisco Business 350 Series - Step 3; Step 4

Step 2
Connect one end of the Small Form-Factor Pluggable (SFP) cable that came with your device into
the SFP+, XG3, or XG4 port of your switch.
Step 3
Connect the other end of the SFP+ cable into the SFP+, XG3 or XG4 port of your switch.
Step 4
Repeat Steps 2 to 3 to the remaining switches.
In this scenario, two switches are being configured for stacking and the SFP cables are connected
to ports 3 and 4 on both switches.
In this example, the cable is connected to XG3 port of the switch.
In this example, the cable is connected to XG4 port of the switch.