I need to sort my handbrake. Screws under boot in cab slackened off and looked through the hole in rear backing plate but I can't see the adjuster in there. Just looks to me like the brake pad I can see. Pumped brake pedal to centralise but nothing changes, still can't see adjuster, anyone able to offer help on this? Also tried undoing the rear wheel nut to have a look in there but it ain't budging. Any ideas on undoing this too? Many thanks in advance. The bus is a '70 Westy.