New Ranger 521C Merc ProXs 4s...Lowrance 12HDS Carbon and Merc digital smartgauge.....I want to see all my motor functions on my Lowrance....I understand buying the Link Box...but is there a harness or digital lines that are needed and were is the best place to mount the Vessel View Link and does the determine harness from motor? Obivously electronics are not my expertise ....