How to open DA plugin content in right pane (evolution)

[peps03]

I'm out of options. How can I make the /user/index.html of a custom DA plugin I wrote, open in right pane (evolution skin)? Just like all other menu links.

Now, it always opens full screen.. see below.

Adding the links myself through custom version of : menu-v4.json

Tried (amoung other things):
"href":"/plugin?src=/CMD_PLUGINS/custom_redis","newTab":false}
"href":"/CMD_PLUGINS/custom_redis","newTab":false}

Thanks!