Spotlight Cam Wired Mounting Bracket Dimensions

I intend to install mounting bracket to an aluminum plate and I intend to drill and tap to use #6-32UNC screws. Thus, I could use the exact location dimensions of the holes where "install" screws typically go through. By vernier caliper, I perceive the bolt circle diameter is either 2.00 inches or 50 mm. Please confirm. Or, better, I see you have provided a pdf file in the past for mounting bracket dimensions of other products. Thanks.