Send 0.001 to @steembasicincome with transfer instructions (e.g. 'Please transfer units and pending vote balance to @receiving_account')
These are manual and processed every few days, but if you ping me on Discord I will usually get it sooner. There are separate instructions (much more rigid syntax) to transfer cross-chain (from Steem to Hive or vice versa). Those are found in the Hive SBI FAQ.