Along the roof is a light grey plastic trim possibly about an inch wide and will disappear into the B pillar at each end. This is held in place by 4 plastic clips and simply pulls out (carefully) under this you will find the bulk head is held in place by 4 torx bolts. This is done from the cab side. personally I found it easier to remove the roof bolts before all the 10mm nuts are off. When your removing the 10mm nuts you're then the correct side to catch/remove the bulk head before it crashes down and damages something.