. Please note: The parts in this table dre completely ambassadorial dor Assembly and Installation Steps illustrative purpose, In the actual production that you receive, some parts are assembled and attached together, Step 4 1. Lock the crossbar tithe junction box of the ceiling by using 2 pension 5/32 screws in the accessories bag. 2. Connect the wires. The photosensitive wire is the one which has waiting on it The Negative wire is the ong which has no writing.