Yes the wiring schematic implies CANBUS lines (high and low) are twisted pairs for both high and medium speed, the latter to/from BCU. Ditto the immersed fuel pump supply cables from what MMC call the "electronic fuel pump relay" which suggests the latter may use PCM to control motor speed. On the Roadster a screened cable is used instead for this feed, with screen braid grounded independent of motor ground, suggesting this may have caused issues prior.
