There are two pages of notes about these sets on the SMM website.
The first attempts to explain what goes where as far as the sets are concerned:
https://www.scorpion-miniature-models.co.uk/centurion-page-modelsThe second describes the real thing as a further guide to what is what. Centurion is a complex subject, but Michael from SMM tried to keep it as simple as possible.
https://www.scorpion-miniature-models.co.uk/centurion-page-realAvailable from:
SMM3541C Centurion Sideskirts Late-production
SMM3541D Centurion Sideskirts Mid-production
SMM3541E Centurion Sideskirt Outriggers and Hangers
SMM3552E Centurion Extended Mudguards Front and Rear
SMM3552F Centurion Late Hull Package ALL marks
SMM3552G Centurion Basic Glacis Plate
SMM3552H Centurion Glacis Appliqué Plate
SMM3552J Centurion Glacis Appliqué Plate
SMM3552K Centurion 127 mm Glacis Plate
SMM3552L Centurion Late Hull Pagoda Decking
SMM3552M Centurion Late Hull Louvred Deck Mk.10 and 13
SMM3552S Centurion Late Idler Wheels
SMM3552V Centurion Silencer Fishtails
SMM3552X Centurion Single Headlights Late Marks with brushguards and tracklink holder