How to provide enclave argument when running with launch file

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I'm trying to enable SROS2 on our existing ROS2 nodes, which use launch files.

I have created a keystore and keys for the node and now I'm wondering how to pass a pointer to these when launching the node.

Basically I suppose I want to find a launch file equivalent for this cli sample command:

ros2 run demo_nodes_cpp talker --ros-args --enclave /talker_listener/talker

Our existing launch file is rather simple and looks like this:

<launch>
  <node name="control_node" pkg="ros2node_ctrl" exec="ros2node_ctrl" namespace='$(env NODE_DEVICE>
    <param name="udp_remote_port" value="xxxxx"/>
    <param name="target_ip" value="xxx.xxx.xxx.xxx"/>
  </node>
</launch>

I tried adding a parameter with name "enclave" in the launch file but didn't seem to work.