I have a RIO switch built into the PTO switch. Pull up on it all the way to use the PTO in reverse. Not many people have snowblowers where I live, so I'm not familiar with them at all. I can see this hooking up to a sensor on an implement, I just can't find any info to verify it. Since the RIO switch is built into the PTO switch, I don't know that I can understand why it would need anther RIO switch on the implement.