[Ridin'High]

If those knobs are trolling valves , which at this point I don't think they are, they would be connected to your transmissions. To make sure follow the leads and determine where they connect. Trolling valves are usually manual cables connected to the transmission, and are individually mounted somewhere in the helm area. They are similar but are larger then the ones you described. No electric switches. I have the exact same set up in 38 with 480CE Cummins. They are used as I described above as back -up throttles. This is from Tara. Sounds like you are hoping they are trolling valves to help catch some of those Lake Michigan salmon. Sorry, but I don't think so. Let me know what you confirm them to be. Hope this helps. Oh by the way, Congratulations on your new boat, Love those 32's