Hello Raphaël,

You can try adding this custom CSS to achieve that:

.am-select-service-title {text-align:right !important;}

You can add it as format HTML to the page: 

<style>
.am-select-service-title {text-align:right !important;}

</style>

and let me know if it helped.

You are welcome, Raphaël.

If you have any other questions or concerns feel free to open a new ticket and we will gladly help.