as i haven't used that model im not 100% but it does look like you set it up properly...
let me guess the next question though!!!! LOL
It wont produce a decent amount of bubbles and waste until it is broken in. That means that if you switch it on, for a few days it will bubble away and no skimmate will be produced, that's mostly because there isn't actually very much to take out the water. A skimmer comes into its own in a tank that has cycled and that has livestock in it. Your mollies are too small to make much of an impact on a skimmer.
So, you dont even need to switch it on just now as we are only just cycling the tank... however, i think this is a really important piece of equipment and it will save you at some point
