^ cheapest way to do it. Otherwise you can buy an adapter
https://www.moddiy.com/products/USB...MIv6H9yqDq1QIVCAppCh3NEA9bEAQYAyABEgKowvD_BwE
Or fans already ready for plug and play
https://www.amazon.com/dp/B009OWVUJ0
https://www.amazon.com/Thermaltake-Mobile-Fan-External-Cooling/dp/B002OJN250?th=1&psc=1
https://www.moddiy.com/products/USB...MIv6H9yqDq1QIVCAppCh3NEA9bEAQYAyABEgKowvD_BwE
Or fans already ready for plug and play
https://www.amazon.com/dp/B009OWVUJ0
https://www.amazon.com/Thermaltake-Mobile-Fan-External-Cooling/dp/B002OJN250?th=1&psc=1