In this video

Begin by taking the individual rail sections and sliding them together. Most modern garage door openers use a simple clip-in system where sections interlock easily. The presenter demonstrates sliding and clicking four rail sections into place, including the extension piece for the 8-foot door. Next, attach the motor bracket (provided with the new opener) to the top of the motor head using nuts and bolts. Ensure the bracket is oriented correctly. Then, connect the fully assembled rail to the motor head by aligning the rail's end with the bracket and securing it with appropriate bolts and nuts. The presenter initially struggles with alignment but quickly rectifies it, highlighting that precision is key. Tighten all fasteners snugly but avoid over-tightening.