Center Pagination/Arrows

For either one, you could do something like this:

/* Center Pagination */
.bne-testimonial-slider.bne-flexslider .flex-control-nav {
	left: 50% !important;
	right: auto;
	-webkit-transform: translateX(-50%);
	-moz-transform: translateX(-50%);
	-ms-transform: translateX(-50%);
	transform: translateX() (-50%);
	width: auto;
}

/* Center Arrows */
.bne-testimonial-slider.bne-flexslider .flex-direction-nav  {
	left: 50% !important;
	right: auto;
	-webkit-transform: translateX(-50%);
	-moz-transform: translateX(-50%);
	-ms-transform: translateX(-50%);
	transform: translateX() (-50%);
	width: auto;
}

If you use both, they both will be centered on top of each other, so if you want both centered and displayed, you would need to further position them individually using the bottom property as well.