1985 Mazda RX7 power steering

I removed the worm shaft from the piston in my power steering gear box, when I was installing a repair seal kit. I need a diagram and instructions for reinstalling the 30 ball bearings. The instructions from all data manual reads: insert shaft into piston so two grooves are visible between valve housing and ball nut. Insert 22 balls into ball guide hole while turning shaft clockwise. Install 8 remaining balls into one side of guide and place opposite side of guide onto it, then secure ball guide to piston. I have removed the pit man arm from the sector shaft, and removed the piston assembly from the gear housing. I need a diagram identifying the holes to install the balls in.