take the battery and tray out,
its under these, held on by 2 13mm bolts
easiest way is unbold it pull it back then undo the wires
theres sometimes a heatshield over it held by 2 10mm nuts(same position as the starter mounting bots
its tight to get it in and out but it does fit

when the old starter is out bang it on the groud, if dust starts falling out, the dmf is dying
thats the usual reason for these starters to fail, they get full of dust and jam up