So, at the endn, do we need to register address where we hold SXDT? No need to send anywhere D tokens for dividend?
You will need to register your wallet address where you are keeping your SXDT. Do not use an exchange wallet or the exchange will get your dividends instead of you. You do not need to send your SXDT tokens anywhere. This here goes over the dividends:
https://d1zzssn32v8b7a.cloudfront.net/media/spectre_dividend_protocol_SXDT.pdf