Air line to Berlin HO from RIO 2500

[Greg]

Hello,

I am trying to figure out how to hook up the RIO 2500 to my Berlin
hang on skimmer. What do people do with the skimmer air line that
used to hook up to the intake of the berlin skimmer? I can't figure
it out. Theres know where to hook up the air to the RIO 2500. Does
it have to be modified? Is it even used? Please help ASAP.

Thanks,

Greg