Ok so here's how it's done:
I only used 2 of the brackets to mount my projector. Ignore the other brackets, I just screwed them on for safe keeping. The one highlighted with the red circle is the 1st screw in front and the one with the green circle is the back one. The back screw on the oposite side is screwd on the oposite end on the same bracket as the green one. The projector doesn't screw directly onto those brackets. There's a spacer between the projector and the bracket. Spacer screws onto the projector and bracket gets screwd onto the spacer
Does'nt look very neat but you dont even see those brackets from the bottom
I only used 2 of the brackets to mount my projector. Ignore the other brackets, I just screwed them on for safe keeping. The one highlighted with the red circle is the 1st screw in front and the one with the green circle is the back one. The back screw on the oposite side is screwd on the oposite end on the same bracket as the green one. The projector doesn't screw directly onto those brackets. There's a spacer between the projector and the bracket. Spacer screws onto the projector and bracket gets screwd onto the spacer