two at the front of sunroof in each corner can be seen when sun roof is opened ,they run down and come out on the a pillar ,if you open a front door you will the wiring loom boot that runs from a pillar to door ,just above that ,may be below cant quite remember there is a small rubber grommet sticking out of pillar ,this has a flat end on it ,these are the drain offs (both sides ),snip end off to prevent re blocking .If i remember right the backs can be found by lifting boot they are either side on the c pillars just above light cluster area ,(but dont quote me on it ) :o).hope that helps
clubby
November 2010