Connect the Power Supply to 1st Module Cable leads to the terminal block and tighten screws. Run cable connector through drilled entrance opening in channel letter, and plug it into the primary module. The primary module serves as the central connection point for each row/column of modules within the letter.

Clean channel letter surfaces to remove any dirt and oil. Peel the adhesive backing off the properly spaced modules and apply them to the inside of your channel letter. If the area is too dirty or bumpy for tape adhesion, use small screws to attach modules to the base of the channel letter.

Once all the modules have been applied, interconnect modules with the module-to-module cables by simply plugging in each cable connector to the appropriate
module port.

When all modules are connected, connect power to each letter using the letter-to-letter cables. Plug one cable connector into the exit/last module and run the cable through the drilled exit opening. Run the other cable connector through the entrance opening in the next channel letter and plug it into the primary module.

Repeat Steps 2-4 for all channel letters.
Plug your transformer into electrical service.