I figured it out if anyone else searches for the answer, no plugin required other than code snippets. Or just editing functions.php
Here is the code:
add_action('woocommerce_checkout_before_terms_and_conditions', 'checkout_additional_checkboxes');
function checkout_additional_checkboxes( ){
$checkbox1_text = __( "My first checkbox text", "woocommerce" );
$checkbox2_text = __( "My Second checkbox text", "woocommerce" );
?>
<p class="form-row custom-checkboxes">
<label class="woocommerce-form__label checkbox custom-one">
<input type="checkbox" class="woocommerce-form__input woocommerce-form__input-checkbox input-checkbox" name="custom_one" > <span><?php echo $checkbox1_text; ?></span> <span class="required">*</span>
</label>
<label class="woocommerce-form__label checkbox custom-two">
<input type="checkbox" class="woocommerce-form__input woocommerce-form__input-checkbox input-checkbox" name="custom_two" > <span><?php echo $checkbox2_text; ?></span> <span class="required">*</span>
</label>
</p>
<?php
}
Second part of code makes it mandatory to check the boxes.
add_action('woocommerce_checkout_process', 'my_custom_checkout_field_process');function my_custom_checkout_field_process() {
// Check if set, if its not set add an error.
if ( ! $_POST['custom_one'] )
wc_add_notice( __( 'You must accept "My first checkbox".' ), 'error' );
if ( ! $_POST['custom_two'] )
wc_add_notice( __( 'You must accept "My second checkbox".' ), 'error' );
}