29-49X - Right hand Drive: Right side of the cowl under the sloping metal floor-plate. It shows the three wiring looms (looking from the inside of the cowl towards where the RHD steering box is). The Generator/ spark conduits come into the interior of the cowl.
Actually the horn wire stays in the engine bay and runs along the top of the cowl as shown in other pictures . It is important from the perspective that it shows how & where the original wiring comes inside the cowl. (Courtesy Phil Green)