Not sure what you are asking or if maybe this was not meant for the Roadster area... But just in case here's an attempt to answer.
TOP0 shows the cloth top
TOP1 shows body color top
TOP2 shows carbon fiber
Omitting "TOP" altogether yields an open air image
If you really are messing with this preview image generator though, I would just recommend you check out
@DamienG 's page, it's the bomb.
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