Your Canvas will arrive with these brackets already on, depending on the size of the canvas it may have one or two. If there are two brackets then you will need to measure from one to the other so you know how far apart you need to place the wall hooks. If there are two brackets on your canvas then you will need two wall hooks which will be provided.
Once you have the measurement of your brackets from the back of your canvas you can put these wall hooks up using a small hammer. The canvas brackets should sit nicely in the wall hooks like in the image below. Hope this helps. Any problems please get in touch.