How can I display an alternate product image on hover?

Hi in this Liquid i only see the hover inside the code. Other liquid i cant find hover.

{%- if show_price_on_hover == nil -%}
{%- assign show_price_on_hover = settings.product_show_price_on_hover -%}
{%- endif -%}

{%- if show_price_on_hover and color_swatch_list != blank -%}
{{- color_swatch_list -}}
{%- endif -%}

{%- if product.template_suffix != ‘coming-soon’ -%}

{%- if product.compare_at_price > product.price -%} {{ product.price | money_without_trailing_zeros }} {{ product.compare_at_price | money_without_trailing_zeros }} {%- elsif product.price_varies -%} {%- capture formatted_min_price -%} {{ product.price_min | money_without_trailing_zeros }} {%- endcapture -%} {%- capture formatted_max_price -%} {{ product.price_max | money_without_trailing_zeros }} {%- endcapture -%} {{ 'collection.product.from_price_html' | t: min_price: formatted_min_price, max_price: formatted_max_price }} {%- else -%} {{ product.price | money_without_trailing_zeros }} {%- endif -%}