I know this not a PC question but seem to be going round in circles with problem so thought someone on here could help.I have a Yamaha Amp model number HTR-5630 A Cd player model numberCD-1266 and a pair of Celestion speakers model number F10.The main issue trying to connect the speakers to the Amp.The following is a picture of the rear of the Amp it may help.They have to connected to the four terminal's listed as A in the middle.But the screw caps do not unscrew fully and I cannot see holes in terminals in which to the speaker.I hope someone can help if you need any more information please ask