How do I register in Oregon?

Need advice please! I just purchased my first truck. I have set up my LLC in North Dakota, where I thought I would be working; however, I ended up leasing on to a company in Illinois. I actually live in Oregon, and I am trying to register my truck there. I currently operate under the other company's US DOT and MC. I do have my own US DOT number. What do I need to do to properly register my truck at this point? Thanks in advance for any help!

 

The intention had originally been that I would be moving to ND, but after forming the LLC, things changed.

 

I have. It isn't terribly clear, and I can't get anyone on the phone in Salem. I was under the impression that because I'm operating under another company's US DOT and MC, I do not yet need my own. However, ODOT doesn't seem to offer an option to register without those. If the company is providing plates, do I even need to register my truck?