WebRTCSrc: Access msid from GstWebRTCSrcPad

Hi, I’m trying to name my streams so I know which is which. I have a sending side webrtcsink and a receiving side webrtcsrc element. At the sink, I set the pads’ msid to custom ones, but I’m stuck figuring out how to access them on “connect_pad_added”. Could someone point me in the right direction?

Thanks in advance!