at first you need create checkout_index_index.xml
in your theme, then need disable item before-place-order in 314 line:
<item name="before-place-order" xsi:type="array">
with:
<item name="before-place-order" xsi:type="array">
<item name="componentDisabled" xsi:type="boolean">true</item>
</item>
Read more here Magento Custimize Checkout Step
Then you need re-add that element on the end of your Checkout, after place order button, like this:
<item name="after-place-agreements" xsi:type="array">
<item name="component" xsi:type="string">uiComponent</item>
<item name="displayArea" xsi:type="string">after-place-agreements</item>
<item name="dataScope" xsi:type="string">before-place-order</item>
<item name="provider" xsi:type="string">checkoutProvider</item>
<item name="config" xsi:type="array">
<item name="template" xsi:type="string">Magento_Checkout/payment/before-place-order</item>
</item>
<item name="children" xsi:type="array">
<item name="agreementss" xsi:type="array">
<item name="component" xsi:type="string">Magento_CheckoutAgreements/js/view/checkout-agreements</item>
<item name="sortOrder" xsi:type="string">100</item>
<item name="displayArea" xsi:type="string">after-place-agreements</item>
<item name="dataScope" xsi:type="string">checkoutAgreements</item>
<item name="provider" xsi:type="string">checkoutProvider</item>
</item>
</item>
</item>
Then copy in your default template(html) after place order:
<!-- ko foreach: getRegion('after-place-agreements') -->
<!-- ko template: getTemplate() --><!-- /ko -->
<!--/ko-->
Good luck!! :)
See More here