the support structure at 525 the method calls for provision of a circuit board having an opening for hook 245 at 530 the opening of the board is aligned with the hook and the board is placed over the hook the board is lowered onto device 200 until contact is made with board stop 230 and board stop 235 at 540 the board is slid in a direction to engage the hook on the edge of the opening in the board since the direction of the throat on the catch is opposite the direction of the throat on the hook sliding to engage the hook tends to reinforce the engagement of the catch in one embodiment the board is slid a distance of approximately 0 200 inches which corresponds to the length of the throat of hook 245 at 545 the method of installation is completed fig8 provides a method for disassembly of one embodiment of the present subject matter at 600 it is assumed that board 125 has been removed from device 200 at 605 end 265 of flexible tab 260 is raised end 265 can be raised by numerous methods for example end 265 can be raised by insertion of a tool.