There are tons of documentation on https://documentation.meraki.com ...
But all depends on how your network is build. I would expect that the routing core is the MS425. With that the MX is completely out of the equation. If the Hyper-V is also attached to the Core, then the Access-switches are not relevant here. All you need to look at, are the two ports connecting to the VM-Host. Now I would think that a 10Gig-Port is a waste of ressources only for Hyper-V-Management. I would put both NICs to trunk and make sure that the VMs can use either ports which also gives you some redundancy.
If your setup is differnet, you should provide some more information here.
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