Where is the "maintenance" part in this "Guide"?
You "adjust" something...based on what?
You should take a "roller" test (MOT station) and then fix things. Collect data and make a plot like that.
That's a maintenance.
As for cables - use ePER (left/right cables are a bit different). Mind the cable mounts/supports (if rusty, flexible, it will spoil the handbrake).
Avoid cheap brands (like "MaxGear", absolute garbage). Self-adjusters must be original (due to bimetal strip and overall performance).