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 19 (click to view)
Should adjustment of the furniture door be necessary, use the clearance of slots as required. At the end of operations, it is necessary to check if the door of the furniture closes properly.
Fix cover (D) on guide (B) until it clips into place.
If the appliance is fixed to the side of the kitchen unit, simply slacken the screws in fixing brackets (D), move the brackets as shown in the figure and retighten the screws. Then fit cover (E).
After completion of the door reversing operation, check that the door gasket adheres to the cabinet. If the ambient temperature is cold (i.e. in Winter), the gasket may not fit perfectly to the cabinet. In that case, wait for the natural fitting of the gasket or accelerate this process by heating up the part involved with a normal hairdryer on a low setting.