How can broadcasting kms and other kms?

[Edelsheim]

On Kurento Media Server 6.18

I want
presenter - WebRTC- kms1 ----> kms2 - WebRTC- viewer

so I tried to
presenter - WebRTC- (on kms1) WebRtc Endpoint - RTP Endpoint ----> (on kms2) RTP Endpoint - WebRtc Endpoint - WebRTC - viewer

(in detail)

1. kms1 create RTP endpoint
2. kms1 WebRtcEndpoint connect sink RTP endpoint
3. kms2 create RTP endpoint
4. kms2 RTP endpoint generate offer
5. kms1 RTP endpoint process offer to kms2 RTP offer
6. kms2 RTP endpoint process answer to kms1 RTP answer
7. kms2 create WebRtcEndpoint
8. kms2 RTP endpoint connect sink kms2 WebRtcEndpoint

but it's not working, please some advice.
thank you.