Mine also has a straight bracket, but it doesn't mount on the firewall, instead it mounts to the left of the firewall over the wheel well. Remove the front bolt and attach the bracket to it.If your pic shows the kit you rec'd, it's different from the one I got, and that's probably why yours worked without any issues. For starters, your mounting bracket has the 90-degree bend to mount on the firewall, mine was completely straight. Also, on your kit, the "output" hose (right side of catch can) doesn't have a reducer hose barb like mine does, it's the same size hose all the way. And your "input" hose (left side of catch can) is different from the one I got in my kit (you can see the reinforcement ribs on that hose, mine was smaller and didn't have them).
Having modified my kit to get it to work properly, I don't really see the reason for these reducer barbs. The four fittings where the hoses have to attach should be similar enough in size that the hoses should be able to run directly from the catch can down to the fittings (like your "output" hose), without reducers, or the larger barbs up at the catch can.