You dont need to hv current account.

You go to Maybank Investment Bank; a company doing Investment Bank able to do varity relate to stock and company listing. - not involved in banking. they their own system keep track the Debit/Criedt of customer acc.
CDS is direct account ; open cash or margin. Acct not visible in maybank2u.

You go to Maybank Equities Center;  a division in Maybank Bank itself; only perform stock broking.
you will hv a current account created and visible maybank2u.
CDS is nominee account  ; open cash or margin.
The different we hv Direct CDS and Nominee Cds becoz of Banking Act;
Non Bank system  hv no right to debit any amount or disclose customer account outside the bank system.

BNM set rule and regulation how Banking and Investment Bank operate.