Custom code on a slider

Hello! I’m trying to figure out how to make slider buttons look like the arrows throughout the rest of the site. Right now, I’m stuck with the general sliding buttons. Is there some custom code that could help me change the style of these? I’ll show you what I mean:
(Home | Nu-Ray Metals) Here’s the section I need help with, the arrows are just under the general arrows. The general arrows are the only ones that seem to work.
(Webflow - Nu-Ray Metals) Here is my read only link, if you could help me, I’d really appreciate it!