how i could correctly Register a listener for icecandidate events on the RTCPeerConnection?

[Ahmed Karam]

in my app i have 2 connection like so 

yourConn1 = new RTCPeerConnection(servers);

yourConn2 = new RTCPeerConnection(servers);
in here  Instructure
https://webrtc.org/getting-started/peer-connections-advanced

they said in number 5 and 6 and 7 
 

Register a listener for icecandidate events on the RTCPeerConnection

For each icecandidate events, transfer it (using a signalling service) to the remote peer

Wait for incoming remote ICE candidates from the signalling service and add them using
RTCPeerConnection.addIceCandidate()

as a caller

 

and as a callee the last three steps also same thing 

Register a listener for icecandidate events on the RTCPeerConnection

For each icecandidate events, transfer it (using a signalling service) to the remote peer

Wait for incoming remote ICE candidates from the signalling service and add them using
RTCPeerConnection.addIceCandidate()

should i listen to each new RTCPeerConnection(x) if i had 2 of them  like so 

p1.onicecandidate = (event) => { }; p2.onicecandidate = (event) => { };

and as a caller sould i add ice candidate for my connection not for the calle or should to add candidate for both of them like so 

var NewlyIceCandidate = new RTCIceCandidate(candidate);

    await p1.addIceCandidate(NewlyIceCandidate);