Welcome to R2R!
I had the Max E260 for a few months before upgrading, and I think it looks like the same skimmer.
You should have a small white air valve and until the skimmer is run in it may overflow from the top of the skimmer, so you need to install the air valve in the grey tube on the side of the skimmer and close the air valve down to closed. Then gradually open the valve bit by bit and it will keep the skimmer in check until it's run in which can take a few weeks until it settles down. Basically if it's fully open you may get white water bubbles coming out the top of the skimmer like crazy!
You also adjust the 'gate' up and down which 'from memory' adjusts the water level to set for wet or dry skimming. I think from memory if you lower the gate it will allow for the water to flow through faster, or it might be the other way around but just have a play with it, you'll know straight away.
Just remember, as it's a new tank until you get 'stuff' in the water, if there is nothing to skim out you may not get much skim mate so try and avoid keeping turning it up to get skimmate otherwise you will enter a circle of overskimming and then underskimming, overskimming........
I found by making SMALL adjustments to the air valve and the gate, over a period of weeks/months you will get the feel of it so just be patient.
Your aiming to have the air valve fully open eventually and then you just remove it
All skimmers have a run in period so for a few weeks don't try and fine tune to much as things change over this run in period or you'll drive yourself mad!