MTD Basses use proprietary Bartolini Pickups that have custom voicings. These pickups are only available to MTD directly. If you are looking for replacements, please contact MTD. If you have another instrument that you want to sound like an MTD, we understand, but we can't help. We have great respect for our customers and the custom designs we develop with them.
We have several MTD wiring diagrams on our site here: https://bartolini.net/doctag/mtd/