giorgino3d, I have split this topic since this relates to your own builds vs sontayas.
Thank you for your links. Your galvos do not have normal connections so you will need to manually wire them to the board. The following picture will show you:
I do not have enough information to help you with connecting your laser. Where did you buy this from? Is there a datasheet? Can you please take a picture of the bottom of plastic driver board?