How to Config Octopi for RaspiCam and USB Camera

Hello, I have now tried many instructions but there are always other solutions. Octopi.txt additional config file and changes haproxy etc. i am confused...

I have octoprint version 1.10.2 and octopi version 1.0.0, old camera stack.

The first camera is a Raspicam and the second is a USB UVC endoscope camera.

What do I have to do now so that I can see both cameras? Do I still need the multicam plugin?
Can someone explain step by step how to set this up?