1997 Nissan Altima CAMSHAFT SPROCKETS TIMING MARKS

I REMOVE AND INSTALL A TIMING CHAIN AND TENSIONER ON A 1997 NISSAN ALTIAM GXE , CAN YOU TELL ME HOW THE PUNCH MARKS ON THE CAMSHAFT SPROCKETS SHOULD BE ALIGNED?. I CAN NOT GET PORPER TIMING IN MY CAR, THE WILL NOT START I NEED HELP!.