update i forgot to say the numberplate goes behind wiper motor on bulkhead side of gap. that stops the filter fouling on way out and back in at the point behind wiper motor if you changed one before ule understand and if its your first time u will follow my tip all skin on hands intact. on refitting once filter has reached start of it housing use ur right hand and push filter inwards as your left hand slides it into position to clip it home. make sure it is seated properly in the housing to keep water and debris out or it will cost a lot in repairs further on check the direction of arrows on old filter before removing so as to put new on in same way.only thing i removed was engine cover and bulkhead firewall as in seatkids pic nothing else touched or loosened .