Peplink Drop in mode to active/passive Sophos firewall

I have seen the excellent answer [MartinLangmaid]( viewed the excellent associated recommended video.  We have a requirement to connect to two Sophos firewalls one active, the other passive as a hot spare to a Peplink 310x in Drop In mode.
To connect the two firewall to the Peplink, would I trunk two connections from the Peplink, one to each firewall? Or is there a better way to do this?
Thnaks in advance.

By default, QuickHA selects the first unbound interface. If this isn’t available, it uses the first DMZ port. This interface is renamed QuickHA mode interface and is assigned an IPv4 address website development dubai from the link-local range