These led mounting strips install under the nuts on the inside vertical corners of the 3D Sourcerer enclosure.  The default length in the OpenSCAD customizer is 215 mm, two of them end to end will run from the bottom of the enclosure up to the second bracket.  Printed in the same color as your brackets, they are hardly noticed.  

Combine these with https://www.printables.com/model/353354 to hide the wires along the bottom of the enclosure, and have a nearly invisible implementation.  The space between corners is 380 mm, so print several long cable clips for each edge where wires need to be hidden.

The OpenSCAD code is parameterized, with default to 8mm wide LED strips.  Wider LED strips can work, probably up to 12 mm.  I suggest printing a 5cm length at first to make sure the mount works with your LED strip.

Print in the default orientation of the STL and OpenSCAD model.  You will need two for each side.