Editing Step 74 —

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On the brackets closest the hole the wires are coming from the power supply at, you will insert the extrusion in the brackets.

This is why the T-Nuts were left loose. The T-nuts go inside the sides of the rail. Make sure all 4 T-Nuts go inside the rail. You may need to loosen the button head screws to get the T-Nuts in the extrusion.

You will lower the extrusion as far as it will go in the brackets. The bottom of the extrusion will line up with the notches located on the brackets as shown in Pic 3.

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