You can see it as reference # 2B highlighted on the bottom right of the diagram.

Product Details:

• Flanged Stainless Steel
• Pump Casting
• Made by Hypro
• Part # 0153-9000C
• Replacement Part for the Following Pump Model #s: 9203C, 9203S & 9203C-R & 9203S-R, 9203C-SP, 9203C-R-SP & 9203S-SP
• 1 Part Required per Pump