1+ Seat squab  
2+ Squab cover  
3+ Squab surround  
4+ Tunnel cover  
5+ Seat cushion  
6+ Seat cushion cover  
7+ Seat cushion  
8+ Seat cushion  
9+ Stud  
10+ Cam plate  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.