It took about 45minutes on my Chaparral 325 MKS. That included clearing out the basement , removing the basement wall and cutting a piece of backing I needed to mount it.
Mine plugged into the back of the fuse panel. It's just a normal 3 prong plug. The outlet is already there. After that it's just mounting and re-attaching the 3 wires. Before and after pics below. The last pic is my Progressive EMS monitor and the converter monitor. The converter monitor line was too short to go next to the EMS monitor.
Sent from my high tech gadget