ACE rear pipe location

Hi all, I have removed the 2 rear ACE pipes ( the ones that come from VAlve block) and now don't know where the new ones go ( top or bottom), does anyone know which is the top pipe & which is the bottom between part no's RQB000390 & RQB00040, I have called LR & they don't know .

Thanks in advance H

RQB000390 upper, RQB000400 lower, at least that's in microcat:
"LAND ROVER 0.00 0 17 ANR6940(S/S RQB000390_OEM) 1 PIPE-ACTIVE CORNERING ENHANCEMENT, REAR, HIGH PRESSURE., REAR HALF ONLY, ORDER CORRESPONDING FRONT SERVICE PIPE TO REPLACE FACTORY FIT ONE-PIECE PIPE, UPPER, VALVE BLOCK TO ACTUATOR " ...nice guys those LR main dealers

Thanks for info,

regards H