This is a remix of the "halo" light for the Ender 3/V2.

I created this with a taller wall and a more round shape, to prevent the LEDs from shining in my eyes, as my printer is places on a table beside me.

For the wires to run in the channel of the extruded frame, you can cut the walls of the tabs, in the direction you want the wires to run to.

I ran wires directly to the powersupply and added an on/off switch on the positive wire.