How do I replace the rudder up line on my Revolution?

This morning I was raising the rudder on my 2014 Revolution, and the thin grey cord broke.  How do I install and adjust a new cord?  I have some Dyneema and Spectra cord of approximately the same diameter.

https://static.hobiecat.com/digital_assets/Twist-n-Stow_Repair_Manual.pdf

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