What sinks are listed when you issue
Usually, you want to
pacmd set-default-sink [sink_number_listed_you_want_output_to]
which will forward further audio requests to it. To move the current ones to it, you'll have to see what's currently playing with
to see the list of applications/ports that are using the old sink and then
pacmd move-sink-input (listed_sink_input) [sink_you_want_to_output_to]
to move those to the other sink.