The last step, settle the USB wires from the sound card to the motherboard. I have to do this several times to let my upper cover installed well, exactly on the right place. And then I fix up the wires on the motherboard with adhesive tape.

After installing the laptop, I began testing its sound card functions. And for this replace the sound card module has no any other external switch, but we could use software to order it open or closed and control volume. Notice, original sound card software is already not applied for this, because the sound card on the motherboard and the USB sound card adapter are completely two different kinds of hardware.
After modification, the sound card is installed inside the laptop, and it could run perfectly! However, USB sound card adapter has no volume magnifier, so you’d have to use an earphone or external loudly speaker.