Passage: Kaiser Wilhelm II had ordered that in the event of war, Goeben and Breslau should either conduct raids in the western Mediterranean to prevent the return of French troops from North Africa to Europe, or break out into the Atlantic and attempt to return to German waters, on the squadron commander's discretion.  On 3 August 1914, the two ships were en route to Algeria when Souchon received word of the declaration of war against France. Goeben bombarded Philippeville (now Skikda, Algeria) for about 10 minutes early on 3 August while Breslau shelled Bône (now Annaba, on the site of the ancient city of Hippo) in accordance with the Kaiser's order. Admirals Alfred von Tirpitz and Hugo von Pohl then transmitted secret orders to Souchon instructing him to sail to Constantinople, in direct contravention of the Kaiser's instructions and without his knowledge.Since Goeben could not reach Constantinople without coaling, Souchon headed for Messina. The Germans encountered the British battlecruisers HMS Indefatigable and Indomitable, but Germany was not yet at war with Britain and neither side opened fire. The British turned to follow Goeben and Breslau, but the German ships were able to outrun the British, and arrived in Messina by 5 August. Refueling in Messina was complicated by the declaration of Italian neutrality on 2 August. Under international law, combatant ships were permitted only 24 hours in a neutral port. Sympathetic Italian naval authorities in the port allowed Goeben and Breslau to remain in port for around 36 hours while the ships coaled from a German collier. Despite the additional time, Goeben's fuel stocks were not sufficient to permit the voyage to Constantinople, so Souchon arranged to rendezvous with another collier in the Aegean Sea. The French fleet remained in the western Mediterranean, since the French naval commander in the Mediterranean, Admiral Lapeyrère, was convinced the Germans would either attempt to escape to the Atlantic or join the Austrians in Pola.

Question: What was Souchon told to do?
sail to Constantinople