Integrate already existing OpenGL app with Juce GUI

Hello, I am new to Juce, and I have already created OpenGL and OpenCV application that I would like to integrate into Juce GUI. What is the best way to do that?
Already existing app needs to open 2 OpenGL windows and connect to external device.
Methods I had in mind:

  1. Try to integrate those 2 windows into Juce
  2. Have multiple pages in one Juce window (1 for GUI, other 2 for OpenGL) if that is possible
  3. Create those windows completely separately from Juce (again, if that’s possible)
    Or any other alternative, which ever is best.
    Thanks in advance.