Hi, my connector looks just like your one in the picture. :???:
The easiest fix is to swap two wires in that cable Robert showed you. The connector may be correct yet the motor wired wrong. There are 2 pairs of wires. Each pair goes to a coil in the stepper. You can swap the two wires in either pair but don't swap the wires in one pair for the wires with another. So swap the green/black pair *or* the red/blue pair.
Another solution is to go here and build the default ultimaker configuration but swap the checkbox for the extruder direction (uncheck "invert axis"):
http://marlinbuilder.robotfuzz.com/
The problem with this solution is that Cura comes with updates to Marlin occasionally and you have to keep rebuilding your own custom copy of Marlin.
- 2 months later...
Thanks for that link. Total life saver 
Glad it works, was curious what the problem was after you left chat 
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In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!-
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The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
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The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
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Cura Alpha With New Tree Support 🎄
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Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
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IRobertI 516
I've seen a couple of people that have had a problem where the leads were inserted in the wrong order on the connector. I took a quick, terrible photo of my connector. It's an old machine but I assume it's still the same on the new ones.
Switching the leads around isn't too terribly difficult. If you look at the opposite side of the one shown in this photo you will see some metal through openings in the case. Use a needle or some other sharp tool and carefully press on these metal tabs while tugging on the corresponding lead. They should pop out without too much resistance. Then simply put them back in the correct order. If they refuse to stay in the connector all you have to do is bend the little barbs (that you pressed down on with the tool) back into shape.
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