I just installed a patio 24' x 22' with a retaining wall that is around the perimeter of it, and it looks like water pools too much at the end of the slope (where patio meets retaining wall). There is a cutout in this same area (at end of slope) of the patio with a firepit leaving about 3'x 5' of patio between the firepit walls and retaining wall (basically the retaining wall is extra seating for the firepit. Water pools up on the patio of these cutout areas so I will need to retrofit some kind of drain and need some suggestions. The grade is higher than the patio behind the wall,so I will be installing a French drain behind the retaining wall. Should I cut a piece of the patio block out in each of these cutout/leg areas and add a drain that connects to the French drain? This would require drilling through some of the retaining wall base however. Would I be better off drilling weep holes into the wall block that empties into French drain behind the wall?
Base is 6" of ca7 gravel with 1" leveling sand. Retaining wall is glued together and is about 17" inches in height.
Thanks in advance for your suggestions to this problem!