IPSec VPN over Megaport to AWS VPC?

Hola,

Has anyone had prior experience configuring an IPSec VPN from say a data center up to an AWS transit VPC using Megaport? Megaport's documentation says it's possible but doesn't seem to be very clear about how it's done. Unless I'm misreading things, they just kind of provide a high level diagram showing a tunnel across their services, and then point to AWS's VPN documentation if you have further questions. AWS's VPN documentation doesn't take into account a service like Megaport in between though.

I have two Megaport drops in a data center cage connected into an SRX fw cluster and looking to do a tunnel per connection as primary and secondary.