Looking for complete dual yoke diagram

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Hi everybody,

I'm very luck. I have found a complete dual yoke really cheaper. I hope receive it in a couple of day now.
The package include 2 complete yoke, 2 columns, the crossover tube with the 2 cogs between the crossover tube and each column, and the 2 pulleys to link the ailerons with the yoke.

I need your help find information about these 2 pulleys, plug to the column. Do you know where I can find some diagram of that ?

Thanks for your help.

Stephan