Just bought HP Officejet Pro 6830 and don't know how to insert these 4 ink tubes into the printer! I don't wanna cause problems to myself so thought to write to you to ask you for a help!Would you please tell me instructions on how to insert these 4 ink tubes into my HP Officejet Pro 6831 printer?I'd like to know each and every little step including the methods of inserting these 4 ink tubes into it and please give me detailed informations about the steps and the correct use of these