Dont know where to connect HD AUDIO or AC-97, & USB

Solution 1:

You need these Lenovo Motherboard to Standard ATX Case Adapter Cables (3 Types)

https://www.moddiy.com/products/IBM-Lenovo-Motherboard-14-Pin-to-Standard-ATX-Case-Adapter-Cable-30cm.html

https://www.moddiy.com/products/IBM-Lenovo-Motherboard-13-Pin-to-Standard-9-Pin-HD-Audio-Adapter-Cable.html

https://www.moddiy.com/products/IBM-Lenovo-Motherboard-11-Pin-to-Standard-9-Pin-USB-Adapter-Cable.html