Where is the ignition timing aperture on a peugeot 205 gti 1.9?

On a Peugeot 205 GTI 1.9, the ignition timing aperture is located on the engine block near the flywheel. Specifically, it can be found on the left-hand side of the engine, typically near the distributor. To check the ignition timing, you will need to connect a timing light to the appropriate wire and observe the timing marks on the crankshaft pulley.