Splitting Heartbeat between two cameras

Would it be possible to split the mavlink heartbeat signal and the trigger pulse to two independent cameras so that both cameras receive the trigger pulse and the heartbeat telemetry data at the same time? I was thinking about making a Y harness and sending the cables into each camera, but I wasnt sure if the signal would need to have power added or if doing this might result in some signal degradation. The problem is that my Telem 2 port is being used by the receiver, so I only have the Telem 1 port to work with, but need to trigger two cameras simultaneously.