Need to bundle 2 port of Fortigate 80C

Hi

I have a Fortigate 80C Firewall.This is having all the Internal Ports configured as Internal Switch.

Just to note Fortigate 80C Internal Switches are 100Mbps each. My target is I need to make the bundle with 2 of these ports so that it can be more than 100Mbps.

Is there any way that in Fortinet 80C I can make the 2 Internal Switch Port as Link Aggregation or Bundle ? If Yes what are the syntax could be ?

I attached 2 port internal switch screen shot in case it helps to understand the scenario.

BR//Subrun