SCO is a 10 year old regional organization for Central Asia, focusing on security, energy, and counter-terrorism. It is, however, interesting that a Central Asian organization is named after a Chinese city on the Pacific. In any case, SCO is seen increasingly as strengthening the hand of China in Central Asia, expanding their influence through investments, oil agreements, security agreements, etc. US consevatives have variously viewed this with great suspicion and as a way to organize anti-Americanism.
With respect to the UNSG race, SCO is a regional grouping without a candidate for UNSG. (ASEAN has Sathirathai. SAARC has Dhanapala, Tharoor, and Deva. And the various Middle East organizations have Prince Zaid. In some sense, Ban Ki-moon is a candidate without a supportive grouping) So far, Uzbekistan has endorsed Ban Ki-moon. Our understanding is that the Kazahks have been quietly advocating for another candidate. This could be an important opportunity for surrogates to discuss their candidates. However, unlike NAM, ACD, and other recent ministerials, there will only be a handleful of countries represented.
It is unlikely that there will be announcements at the end of this. However do look for Foreign Ministers and Prime Ministers traveling to Seoul, Bangkok, and other capitals in the next several weeks if there is followup from these meetings.