I would recommend the 6 volume OEM set, check ebay. I thought it was well worth the money for a 3 cylinder general purpose ford tractor. They cover the wiring for this, but there is more to it. Last time I had to pull the instrument cluster, I knew I had the oil pressure warning light on the wrong terminal, and one other wire wrong, but I was able to figure it out and all is correct now.
The darned bulb housings on each wire don't like to stay in place even after pushing them in correctly, so I used a single strand of electrical tape to keep those in place while seating the instrument cluster against the gasket and tightening down.