Anybody familiar with Apex to Stream cables?

[porpoiseaquatics]

Ok....I have Tunze pumps and I know I can connect them to my Apex however I find that there are two different cables and no explanation as to what the differences are. The pictures that have been posted look exactly the same for each. Does anybody know the difference between the 1 channel and the 2 channel versions?

 

[porpoiseaquatics]

barry_keith;1062359 wrote: just a guess but wouldn't the 2 channel just be for two stream pumps? The two dimming port have 2 channels each.

That was my guess but the 1 channel has two plugs or at least the picture they use shows 2 plugs so I don't know. That's why I'm asking.