LED staircase trial assemble

We have finished the residential project for an Australia customer, which is with LED strips light under the solid wood treads. Usually customer choose the style and send us the plat drawings, then we design and quote with details. Will send the shop drawings for confirmation before production. Customer should check and confirm the shop drawings with all details on site. After that we will produce and trial assemble in factory. Then will send the photos to customer before we take off and do the surface treatments, such as painted, powder coated, galvanized. All these finished, we will pack and the send the photos of package before delivery. Customer may will ask how wires connect to the house, it's usually three connection as below, wire will go through to a transformer, then you just put the socket to your house's one.