PLUSH OPT help

[DirtyErnie]

Trying to figure out which wire is which output on a Plush OT-1000 transformer. I believe there's a yellow and an orange wire in there, only one of them is connected to the speaker outputs. I'm going to assume they are 8 and 4 ohm outputs but I have no way to reliably test and find out for sure.
Anyone have any idea?

Thanks!
Ern

[DirtyErnie]

*Bump?*

[defaced]

Do you have access to a low voltage AC source (transformer, wall wart, something in the 6-12v ish range) and an AC volt meter?