How to avoid certain angles using lidar for Turtlbot

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Due to layout requirements, I had to mount the LDS-01 sensor in the middle of my turtlebot3. So far, it does not affect SLAM and navigation actions. Nevertheless I can see the metal bars of the robot structure as small points when I perform SLAM actions, but they are, as said above, not marked as obstacles. Still, I want to "delete" those metal bars to get clean results. I would guess to find the Sensor driver and try to skip those areas. Still, I first need to find this driver. By going to the launch file I got the name of the driver:

~/catkin_ws/src/turtlebot3/turtlebot3_bringup/launch$ vi turtlebot3_lidar.launch 
<launch>
  <arg name="set_frame_id" default="base_scan"/>

  <node pkg="hls_lfcd_lds_driver" type="hlds_laser_publisher" name="turtlebot3_lds" output="screen">
    <param name="port" value="/dev/ttyUSB0"/>
    <param name="frame_id" value="$(arg set_frame_id)"/>
  </node>
</launch>

But I did not make it to find the driver in the ROS system (sorry, I am still new to ROS). So my question is, how can I find the driver in order to change it and how would you approach to avoid angles?