Karabiner tmux - make caps lock main tmux key and backquote secondary tmux key for shell sessions

private.xml

<?xml version="1.0"?>
<root>
  <appdef>
    <appname>Terminal</appname>
    <equal>com.apple.Terminal</equal>
    <equal>iTerm</equal>
    <equal>net.sourceforge.iTerm</equal>
    <equal>com.googlecode.iterm2</equal>
  </appdef>
  <item>

    <name>Mahemoff TMUX Key Remappings</name>

    <item>
      <name>TMUX: Right Control to Ctrl+B</name>
      <identifier>private.right_control_to_control_b</identifier>
      <only>Terminal</only>
      <autogen>
        --KeyToKey-- 
        KeyCode::CONTROL_R,
        KeyCode::B, ModifierFlag::CONTROL_L
      </autogen>
    </item>

    <item>
      <name>Restore backquote and tilde with Ctrl</name>
      <identifier>private.control_q_to_backquote</identifier>
      <only>Terminal</only>
      <autogen>
        --KeyToKey-- 
        KeyCode::BACKQUOTE, ModifierFlag::CONTROL_L,
        KeyCode::BACKQUOTE
      </autogen>
    </item>

    <item>
      <name>TMUX Inner: backquote key to Ctrl+A</name>
      <identifier>private.section_to_control_a</identifier>
      <only>Terminal</only>
      <autogen>
        --KeyToKey-- 
        KeyCode::BACKQUOTE,
        KeyCode::A, ModifierFlag::CONTROL_L
      </autogen>
    </item>

  </item>

</root>

• Karabiner Settings > Misc & Install > Open private.xml
• Need to "Reload XML" after editing and use checkboxes to accept the new rules
• This is for US keyboard