IPSEC VPN with intermediate NAT device (microtik)

I have the following infrastructure:

PEER IPSEC >> INTERNET >> MIKROTIK >> CISCO

My question is: How do I configure the device to make microtik IPSEC? Knowing that the device has an ip microtik publishes on its WAN connection and a private IP on your LAN connection.

On the other side, we have a sonicwall team with public ip.

I hope you can help me.