Magento 1.9 update street adress line 2 via PHP

I’m writing some codes to update customer address using php, but the site use 2 street fields,

when i set it like $address->setStreet1('test 1'); it’s not working $address->setStreet('test 1'); ads only first field

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$customerId = 1300;
$addressId = 920;

$customer = Mage::getModel('customer/customer')->load($customerId);
$address = $customer->getAddressById($addressId);
$address->setStreet('123 Main Street');

anyone know how to fix this or other solution for set the street of existing address