ᐅ Assembling four cabinet carcasses but with no instructions provided

Hi,

I designed a large cabinet online, picked up all the parts, and now many of them are in the basement.

I’m a bit stuck because I don’t know exactly where to start.

I thought I would first assemble the frame lying down, then lift the cabinet upright and continue with the interior. I have lighting inside the cabinet—will this plan work as I imagine, or do I need to consider anything regarding the lighting during assembly before standing the cabinet up from the floor?

I didn’t receive any instructions. Where can I find out which item numbers or parts I need for the “frame”? How do I connect the 4 carcasses to each other? Since I only have individual parts, it’s not obvious that I want to “clamp” 4 carcasses together.

I hope you understand my situation and can give me some tips. Thank you very much!