Translate VPN address to Local

Untitled.png
Hello guys. I drew this awful schematic of my topology.
So I am accessing this network with l2tp VPN. Host .30.150 is a TP-Link (ewww) router which does not support remote access feature, so in order to get into its web UI i have to be connected directly to 192.168.30.0 network.
My question is, how can I add a static translation of 10.10.10.10 to 192.168.30.xxx ? Have tried adding a scr-nat but this did not work. Not sure if I did anything wrong, or this feature is just not supported. Some help please?
Thanks

/ip firewall nat add chain=srcnat src-address=10.10.10.10 dst-address=192.168.30.150 out-interface=<WhatEverInterfaceIsConnectedToTP-Link> action=masquerade

It worked! Thank you.
Hope this helps other people as well