.hero-slides .slick-prev {
  left: 20px;
  z-index: 200;
}

.hero-slides .slick-next {
  right: 20px;
  z-index: 200;

}
.testimonial-slides .slick-prev {
  left: 10px
} 
.testimonial-slides .slick-next {
  right :10px
}