It doesn't seem like these tractors are set up with the intention of adding aftermarket electrical equipment to the existing blocks/harnesses. I've tapped into the 12v Aux plug wiring for the rotation motor on my Cyclone and now will need to get power to a Ken's diverter valve. I'm sure more will be added in the future. With this in mind, I'm thinking a sub-panel directly from the battery might be in order.
I've done a fair amount of this type of work in my boats, so am comfortable with the wiring aspect. My typical set up was to run the appropriate sized cable from the battery to one of these and then add the new equipment to the terminals.
Amazon.com : Blue Sea Systems 5025 ST Blade Fuse Block - 6 Circuits with Negative Bus and Cover : Auxiliary Fuse Block : Gateway
Has anyone done something similar? If so, what is the easiest path to get a decent size pair of wires (8AWG?) from the battery to the back of the cab and right console.