(XBOX)destroyer03613

On the one time account merger I;m confused. For my specific situation I've got this account I'm posting from a LR3 xbox account and a mr7 or 8 pc account i want to set this account(xbox) as my primary and merge my pc into this do i just login to this account once i have access to cross save and link my pc account to this account or is there something else i will need to do to keep this LR3 account as my primary?