I wouldn't even bother with it, but if you insisted, and were a client, I'd recommend that you go with an additional 2-way switch added for out-of-phase on the main control plate, but that's just me. Then, I'd ask you, in a condescending way, why you'd even mess with it. The jag already has tons of options...just go get a cheapy mustang! You'd then get all huffy, pack your guitar and leave my shop without even saying goodbye. I would LOL.
Sorry, man. I just had to. 😆