I have a 2008 210 Elite with Merc 250 Pro XS. The tachometer has the digital screen at the bottom with 2 buttons to scroll through the different read outs. The pixillation has went out and I am going to install a Level 1 Mercmonitor. Does anyone know if is plug and play with the factory gauge or do I need to order the 20' cable that goes from the motor to console. I assume that since the current gauge reads out the engine information that the cable is already installed. Any help is greatly appreciated!20180313_122925.jpg