Camshaft Position Sensor Location

[Oka]

Can someone please help me understand more of this diagram?

1. What are parts #1, #2 & #18 got to do with this diagram?
Those three parts are at the top of the engine by the oil filling spout.

2. The two Camshaft Sensor types in the diagram does not look like the one for my 2001 V70XC/XC70.
The one specified for my car has a stainless steel plug, red and white set of wires and and a wire harness.

3. Where in the world is the sensor located on the engine? All I see are for the V70. The Volvo repair manual's
location/description is vague.

Thank you.