I have been studying SYNTEC for almost 2 years.
You have to become very familiar with it.. to retrofit a machine, to use it very well...
A lot can go wrong.
There is no one way to wire it.. and you have to become quite an expert before attempting to install it.

This is not something we can help with over the internet...

BE WARNED.. Mach3 or UCCNC, are very easy to install, compared to SYNTEC