I just thought about the fact that it's a 5-string, DiMarzio doesn't appear to make the Model J for a 5-string, which I find odd, but the Ultra-Jazz are DEEP:
https://www.dimarzio.com/pickups/5-string-bass/ultra-jazz-5-pair
They're also high-output, so you probably wouldn't even need to wire them in Series, but people have.