Open class ( Nimbus 3 ) bug wiper installation

Hello,

i need to install bug wipers on a Nimbus 3 (single seat, but the 3D
shares the same wing geometry except for some foward sweep) and would
be most grateful if anybody could share some experience on whether the
retrieval cable (the one that pulls the bug wiper back towards the
fuselage) should be on top or below the wing.

Generally these go below the wing but i have been told that on some
open class ships it would be better to have them on top of the wing
since the risk of the cable getting stuck on the corner of some
aileron or flap should be lower. The reason for this might be that due
to lots of wing bending the cable tends to "fly" above the wing rather
than being pulled against the lower surface.

Any input ?

Thanks
Martin