This is a disaster and needs updated from what you learned today in your other thread.
But beyond that, you talk about putting the connections to the router. This is wrong. A router routes traffic. it is not a switch.
You still require a switch.
You put multiple NICS in a team and plug those into the switch. If the switch supports full LACP then you can get awesome performance, if not, switch independent mode is the best solution.
You install Hyper-V Server 2016 on all three boxes.
On all Servers:
Create 1 partition for the Hyper-V Server drive C (I use 80GB, but I think the technical minimum is 32GB)
Create 1 partition from the rest of the space to mount as drive D inside Hyper-V
This D drive is where all of the guest files will be stored. Config files as well as replicas, checkpoints (snapshots), and the virtual hard disks.
On Server 2, restore all your current servers as new VMs
On Server 1, create a small VHDX to install Windows and run Veeam.
On Server 1 create a large VHDX to house the backups. This will bethe D drive inside the Veeam guest.
On Server 3, setup a test environment or sell the hardware. You could use Hyper-V replication, but you need SA on the original guest VMs or full licenses for the replicas.