I've got an old DiMarzio SD pickup, but it's confusing me somewhat.

As per the picture it has red, black, white. I'm installing it on a 70s Ibanez Les Paul with no coil tapping.

Am I right in thinking that I can solder white/black together, solder outside as ground (as per currently fitted pickups), and red connected to the volume pot? The pickup cable on the 2nd image is the one on the left.