2.1. Install the back panel. Make sure to insert the tab into the slots on the receptor according to the manufacturer.
2.2. Measure and test fit the shower panel on the wall containing the plumbing.
2.3. Mark the position of the faucet, shower head as well as the spout if needed. Use a large piece of cardboard to match the measurements of the panel and place on the wall containing the plumbing. Press against the wall and the fixtures will put indentations in the cardboard. Take down.
2.4. Place the cardboard on the panel and mark the spots where the plumbing fixtures will go.
2.5. Determine the hole size according to the faucet requirement. Make sure the cover plate will be large enough to cover the hole.
2.6. Drill the valve hole with a hole saw.
2.7. Position the panel top first then slide down into position. Snap in place.Make sure the faucet and valve hole are position correctly.
2.8. Position the last side panel, top first then pivot in place.Position the last side panel
2.9. Make sure the end walls are flush with the top edges of the receptor leaving a gap of no more than 1/32″.
2.10. Fasten the front of the end panels to the studs. Start at the bottom moving up.
2.11. Make sure the walls are plumb. Secure the top panels to the studs with galvanized screws and use shims if needed.