Reinstalling Factory Radio

[Liberty]

Fortunatly for me the delco has the original plugs included just in case my originals are gone. I could've purchased a digital one, but I have my doubts on my truck having that final plug. The optional equipment list for the truck indicates it originally only had an AM/FM stereo unit. (It actually doesn't list a radio type, so I assume the silverado package included that as base)

Now I've had my bezel off many times, and the opening is still stock, but that hole is kinda small, will the radio fit through that or will I have to go through the glovebox?