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´s for your help, I already recived these manual from you
Text excerpt from page 11 (click to view)
4. When the terminal is pushed into the receptacle as far as it will go, push down the edge of the surface unit
opposite the receptacle. The element hold-down clip will keep the surface unit from moving around.
NOTE: Drip bowls help catch spills. When
they are kept clean, they look new longer. If a chrome drip bowl gets discolored, some of the utensils may not be flat enough, or some may be too large for the surface unit. In either case, some of the heat that�s meant to go into or around a utensil goes down and heats the drip bowl. This extra heat can discolor it.