Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank you for your manual It has the basic things to and i use the Oszi for Longer Time.
THX
Text excerpt from page 27 (click to view)
Installation
^ Secure the ducting to the mounting plate using a hose clip.
^ Insert the short edge of two spring clips into their slots from below and position so that the tab faces the center of the mounting plate. ^ Pull the power cord through the mounting plate. ^ Insert the four countersunk screws M 6 x 20 into the recessed holes from above. Tape the screws from above to prevent them from being pushed upwards when the nuts are tightened.