As far as the factory rear light,I purchased one a few years ago when I had my BX25.I was very disappointed with it and eventually threw it in the garbage as I bought it from the dealer with the understanding that I could not return it.The light output was very poor,I tried changing the ground but it made no difference.As for the kit,it wasn't much and seemed low quality,not what I expected from Kubota.As for the plug in,it is taped up inside the wiring harness at the left rear of the tractor.If you search on here you should find a photo of it.If I was to put a light on my BX2360,I would go with LED.They have a low power draw but put out a lot of light.I put three on my 3240 and am very pleased with them.