Splitter tube in ASL Hurricanes DT MK2

Does anyone know which is the splitter tube in the amp? The new Hurricanes have 4 input tubes, and supplied schematics are confusing. Thank you for input.
Scan the schematic and send an image to me at jeffreybenr@cox.net and I'll opine.

The three-6SN7s 'Canes used the two sections of the outer 'N7s as a phase splitter and then cathode follower, the latter apparently necessary to drive all those '88s.