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They’re both very clearly marked in the diagrams. 6 goes to the ECU and 2 goes to earth.

What’s your location?

Then you'll probably need the TPS wiring too but you can get that from the throttle body with a multimeter. Also MAF signal is easy to get.

I fitted a Chiptorque Xede piggyback to my TB45E but it...

These are the other numbered connectors for that 8 pin F22 plug.
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75636

This is for TB45E. Note the 8 pin plug in the bottom left corner labelled F22 and the distributor (camshaft position sensor) also labelled F22.
Those should be the colours matching the plug.
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