The first picture looks like the secondary pump but the B2 piston and kickdown switch are also in the area. Clean and dry the area to isolate the source of the leak. If it's the secondary pump, confirm whether it's leaking between the case of the secondary pump and intermediate plate (outer diameter). It's more complicated if it's leaking from the cut-off piston (inner diameter).

x2 on checking chain elongation rather than visual inspection of guides. x2 also on focusing on the starboard cam.

Sixto
87 300D