use the soldering iron to weld wires on the RGB board and build a 3in xh2.54mm Male connector
extent of one wire from the `out` port of the lift RGB board
use M3x6 BHCS to fix RGB boards on the holder
lead the light cable from the `umbilical board` by a 4pin xh2.54mm Male connector with a 3pin xh2.54mm Female connector
connect the RGB boards by xh2.54mm connector. (PS, the `out` port wire on the left RGB board needs to be plugged into the 4pin xh2.54mm Male connector)
connect to the motherboard and check all the wire sequences of xh2.54mm connectors