But you're quoting the A/C SWMP and not the engine repair manual. Sometimes they do contradict each other.
They serve different purposes. In general, the SWMP applies when the engine is "On-Wing", the engine manual applies on the cradle. In 'On-Wing' cases that aren't covered by the SWMP, the engine manual may be applied.
You must also bear in mind that in many cases the wiring harness on a QCE is an 'aircraft part', designed and produced by the aircraft manufacturer and not the engine manufacturer.
The same applies to other major components such as APU or landing gears.