Welcome to the forum! Thank you for providing the photos.
“Do not live insertion!” These labels make me grin every time I come across one in pics.
You will follow the standard installation guide for most of the connections, but the power plug will need to be connected as per our 6 Pin Installation Guide.
For reference, you may also find the LSPU Connection Guide helpful. I can’t see all of the connections on yours, but it looks to be a high power version covered in this doc.
Do you have optical endstops on your machine (possibly located at the end of the ribbon cable, near the head)?
Can you provide a picture of the motor that operates the bed under the work area?
For the configuration changes to dial in the physics for your machine size, review our Larger Laser Machine Installation Guide. There’s a great video to watch in this article that covers other considerations.
We also recommend reading our Buyer’s Guide: https://cohesion3d.com/cohesion3d-laserboard-buyers-guide/
There are a lot of other resources on our Knowledgebase as well.