Hi,
Let's have a look at some diagrams :
As we can see in the section circled red in both diagrams, one of the diagrams shows PL and NL Come from the A/T Indicator switch to tell the ABS Computer when your in Park and Neutral.
NL - Neutral
PL - Park
the wire labelled "ECT" seems to come from the sensor and is only used in Automatic models.
Since you have a manual you probably would leave these wires out.
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