A few questions/issues with the new xcarve

So, following the instructions on the website, I have my system built…ish. a few things bother me. How do you know when you have the tension set on the belts right?
How do you set the dip switches/potentiometers for the upgraded stepper motors?


These are the ribbon cables I got. Now with my computer background, those cables are set with the pins in a certain way. Having to flip one side, will that cause problems?
How do I set up the zprobe part? Didn’t see anything about it…

Are there any other things to check/watch out for before plugging it in and giving it a test? (This is my first anything like this, so I apologize for the ignorance.) Thanks in advance.