These ugly instructions were supplied with a SR SUNTOUR Durolux SGX. But they don't actually refer to the Durolux SGX but actually cover:

• RD-NRX850
• RD-XCR750
• RD-XCR650
• RD-XCC550

• RD-XR180-SSB(Z)
• RD-XR180-GXB(Z)

• RD-CR800
• RD-CR400
• RD-CR300

• Publisher: SR SUNTOUR
• Country: Taiwan
• Date: 2004
• Derailleur brands: SR SUNTOUR
• Derailleurs: SR SUNTOUR Durolux SGX