Here is the link for Mac & Windows OBS instructions to multistream on different platforms.
*****Do not Go Live on your YourWay.Store Webcam before you start streaming on OBS it will interrupt the signal and you will not be able to connect to OBS. Go Live on YourWay.Store after you click the start streaming on OBS.***********
Click on the Go Live on the right side next to Chat tab click the Cam.
A second window pops up then you click Hide Camera.
Final step scroll down on the same window and click Screen Share.
OBS Studio | Larix Broadcaster
On this page on your performer dashboard scroll all the way down and click on Streams to setup OBS Studio | Larix Broadcaster