Sentence:  The next task is to pass the cable <WSD>wiring loom</WSD> through the boat. If you have ducting running along the inside of the hull this is ideal, but most boats will not be equipped with such luxuries, so you will have to find the best way through and then protect the cables with cable trunking (plastic protection). 
Meaning of the word marked with <WSD> tags:  A (wiring harness), a bundle of wires that transmit signals or electrical current within a device.