<script>
  window.upcartSubscribeCartOpened(() => {
    setTimeout(() => {
      // The cart may render inside a shadow root, where document.querySelector
      // cannot reach it. Search the shadow root when there is one.
      const host = document.getElementById('upCart');
      const scope = host?.shadowRoot ?? document;

      const buttonLeft = scope.querySelector('.control-arrow.control-prev');
      if (buttonLeft) buttonLeft.innerText = "<";

      const buttonRight = scope.querySelector('.control-arrow.control-next');
      if (buttonRight) buttonRight.innerText = ">";
    }, 300);
  });
</script>

.carousel.carousel-slider .control-next {  
  right: -34px !important;  
}