Step 2: On the top right corner, hit Select Wallet and choose SubWallet. Then select your desired account.
Step 1: On the left menu, select Bridge. Choose the Issue tab.
Step 2: Enter the amount of BTC and the system will automatically select a vault for you. If you prefer to select the vault yourself, click Manually Select Vault and choose from the drop-down list. Then hit Confirm.
Step 3: In SubWallet's pop-up window, key in your password and hit Approve.
Step 4: Deposit your BTC to the address shown on the pop-up message or scan the QR code. When finished, click I have made the payment. You can view your transaction on the Transactions tab.