Basic transaction data (such as amount, currency, date, etc.) is automatically sent to Xero, once you setup the integration. Basic data is pushed to the Bank Statements section in Xero, after you click on the Accounts tab and then Bank Accounts.
You can also export transaction metadata (attachments, notes, Xero Categories, etc.) to save you time. Transaction metadata is pushed to the Account Transactions section in Xero, after you click on the Accounts tab and then Bank Accounts.
Therefore when you go into the Reconcile section under Accounts in Xero, you should see the basic data on the left hand side and the metadata on the right hand side.