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 15 (click to view)
Fitting the Chimney Stack
The chimney stack consists of two 2 sections. 1. Fit the upper section (S) first. Expand the chimney slightly to allow it to be fitted over the wall brackets, and then secure the upper section using the 4 self tapping screws provided. Fit the lower chimney section (I) as above ensuring the base of the chimney is fitted correctly into the recess around the top of the canopy as illustrated. When the chimney stack has been installed, fit the two venting grilles into the apertures located on either side of the lower chimney stack. The grilles are marked with two arrows and should be fitted with one arrow pointing upwards and the other towards the front. When the cooker hood is used in recirculation mode, ensure the grilles are properly secured to the recirculation spigot R, as illustrated.