Try our re-instated info resource - "Aladdin's Cave" (Main menu)- sorry it's taken so long to fix
You should see a small 'bobble' on the flange of the inlet rubber Matt. These line up with the corresponding 'bobble' on the plastic airbox. Get this right and they should align making life simples
Are'nt they numbered underneath as the only go in one way as per your question? sure they're stamped 1 through 4