[Orion] Where do the filters go?

[Eric Rosenberg]

I have the INRAD 756 (2400 Hz), 761 (1800 Hz) and 762 (600 Hz) filters, 
ready to install in my still-in-the-box Orion.

As I haven't opened the box yet, I'd like to know which slots (i.e., 
where) do I put them in?

Thanks in advance,

Eric W3DQ
Washington, DC