I'm really surprised you made the blue and yellow wire work. I got the 45 for my 4010 and when i ran it through the firewall it looked like it was about 2 feet short to get under the seat. I'm considering swapping the blue yellow for the red and black wires.
When I look at the Kawasaki website, I don't see a 45 that fits the 4010. www.kawasaki.com/en-us/shop/vehicle-accessories/side-x-side/kaf620mmfnn/ I only find the 25 and 35. Maybe the 45 isn't a direct fit? The photo of the 25 shows all the wires. The black and red are around 2 feet long, and the blue and yellow are around 4 feet long. www.kawasaki.com/en-us/shop/vehicle-accessories/side-x-side/kaf620mmfnn/99994159725S/mule-40004010-trans-vrx-25-s-winch-kit?cm_re=LISTING-_-VEHICLEACCESSORY-_-BUCKET
The VRX-25 is rated for 2,500 pounds, and the Mule only weighs 1,600 pounds. They do make a VRX-35 that fits in the same space and is rated for 3,500 pounds if you wanted more pull strength, but I didn’t think it was worth the extra money for my needs.
I made an outline with a Sharpie where I wanted the switch to go. Then I drilled a small hole in each corner. Then I use a Dremol tool with a plastic cutting wheel to slice between the corner holes. Dremel EZ476 1 1/2-Inch EZ Lock Rotary Tool Cut-Off Wheels For Plastic - 5 pack a.co/d/gtZDAsJ
I purchased a knockout tool for Carling rocker switches, works well on plastic and thinner metal…. Perfect hole every time. I can go and look in the directions from the manufacturer and get the name if your interested?