To get the two sending units wires into the engine compartment you have to remove the engine compartment mounted car battery and its case. In this rubber access point there are several unused dimples. Once you get both wires into the engine compartment run them up an along the existing cable run that heads toward the front of the car. Ty wrap as you go keeping the wires in line with each other. The oil temperature sending wire will run down the fender well toward the oil drain plug and the oil pressure wire will run over towards the oil filter housing.
Lets do the oil temperature wire first.
From the fluid reservoir, ty wrapping as you go, run the wire down to the large lower brown ground cable which goes between the body and passenger side front engine mount. Continue up the top of the engine mount and pass the wire through the rear most gap between the engine mount and the engine. This lets the oil drain to the sump. Remove the oil drain plug using a 17mm socket and drain the oil. Replace the oil drain plug with the oil temperature sending unit.