E70 4.8l V8 Coolant Drain Point location (Engine block).

[Theburn]

I have a 07 4.8l V8 E70 N62 engine. I am wondering if anyone would know the location of the engine block drain point for the coolant.
I have located the radiator drain point but I can only get 5 litres out of the car from here. The rest is in the engine block. Coolant pump is mechanical not electronic. I replaced the upper hose from the Radiator to the pump (leaking o-ring). I don't want to start disconnecting everything either to drain. If someone can tell me or show me where the plug is located.

Many Thanks

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