You may have noticed the bend in your machine's tension mast. It's there for a purpose!
Here's a secret:
This is one of the few machine setups that isn't critical. The purpose of the tension mast is to guide the working yarn through the tension dial to control the flow of the yarn to the yarn feeder(s) of the carriage(s).
In spite of what your manual says, if your mast is leaning to the back or front, it really doesn't matter,
as long as your yarn is feeding smoothly.
If your machine is close to the wall, you may want to turn the mast so it isn't hitting the wall.