Rotax 912is/915is Installation

[VictorV]

Both of these engines have the same basic wiring so I'm interested in hearing from those that have either type of engine.

There are 5 cables that come from the engine lanes which interface with the ECU (3 of them) and the rest of the aircraft electronics (the 2 HIC connectors).
4 of them have a ground tab on them and I am trying to determine where the ground tab is supposed to be connected. The 2 options are EMS
ground (on the fusebox) and airframe ground. The EMS ground is connected to the airframe ground only during application of start power.
In the 915is installation manual there are 2 references to these grounds and they appear to contradict each other:

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and

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Does anyone know which one I should follow?

Victor