Don't worry about the handbrake cable
I know it makes it awkward, but screw in the pistons,
Put it all back together,
Most important
Press the foot brake as many times as needed till you get a firm feel,
Operate the handbrake till that firms up,
When everything is together, go for a GENTLE drive, with many brake applications, start getting the pads bedding in
Use the brake often, but don't over heat
Sent from my SM-A546E using Tapatalk