9. Wall oven tower installation instructions. 1 Position base cabinet. Fix base cabinet into position. 2 Install both side panels. Install both side panels as per side panel installation instructions. Tip, Take particular care to ensure that the two panels are plumb as if there is any twist to the front edges then you will find it difficult to install the microwave cabinet. 3 Install the oven base. Attach the oven base on top of the oven base cabinet. 4 Preparation of the top cabinet. Temporally fix some scrap material to the top of the top cabinet so that they overhang the sides approximately 16mm +. Make sure that you can remove these later after it is in position. If you cannot remove the material you will need to fix this from inside the cabinet. Tip, Position your screws approximately 50mm from the front and 25mm off the back to the inside of the cabinet this way if you are using the bulk head frame you can use the same screw holes later.