I have a Bush LY1511WCW TV which I use as a monitor, I have a wall mount with the correct VESA connection, however on the back of the TV the vesa holes aren't really holes, they are located in the correct position but seem only to be small circles in the plastic. To elaborate, there is no actial hole in the back of the monitor, but 4 circles which outline where the vesa mount should be. The plastic filling the holes seems solid, so should I attempt to use screws into the plastic rather than bolts? Any help or advice would be greatly appreciated.