I have found the solution for the people who have same problem like me of not having orange and black holes for pc output. One_Dead_Headphone Said this and it works
In the system tray you will find Realtek HD Audio Manager. Open this. Select 5.1 Speaker and make sure all your optional speakers are checked. Now go and plug in the green audio cord to the center plugin an the back. The popup should open and select Front Speaker Out. If there is no pop up then look to the right under ANALOG back panel and double click the center (green) plug just to make sure its front speaker out. Plug the Black cable into the BLUE plug in the back This is your Side Speaker Out (possibly Rear). The Orange plug goes in the remaining back plug and is...