FortiLink over QSFP+ to 4xSFP+ cable

Hello, I want to connect an FSW-3032 to a FG600D via FortiLink. As you can imagine, since the FSW-3032 supports 40G QSFP+ ports only, I have to use the QSFP+ to 4xSFP+ cable. My question is: Is FortiLink supported over this type of connection? Is there any other way to connect a QSFP+ port to an SFP+?   Thanks Andreas