On the rubber oval shaped grommet under the brake booster, are a number of little concertina'd little rubber tits ... cut the tit down and there's a hole to put your cables through ! 
Lube up the cable with a touch of innox, then push through the hole until you have around 300mm or so through, then pull through from the drivers footwell.
Engine sensor wire has a male bullet crimp lug end. The grommet/hole just stretches to accomodate the lug.
Kev..
2014 Isuzu MUX LST with fruit
2008 Isuzu D-Max
2015 Kimberley Kamper "Classic"
Gone ... 2004 D2a Td5 Auto "Classic Country" Vienna Green
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