How do i use OR statement in regex

I have two links where i need the partNumber,the problem i am facing is in onecase it is at the end of the link and in another case it is after the query partNumber=

https://www.opsm.com.au/ProductDisplay?urlRequestType=Base&catalogId=12601&categoryId=3074457345616695670&seoNameToken=air-optix-colors-2pk&langId=-1&manufacturer=AIR+OPTIX&facetTokenValue=facet-lifecycle%3DMONTHLY&partNumber=ac-airoptix-colors-2&storeId=10151

https://www.opsm.com.au/womens-sunglasses/ov5514su-kasdan/827934482050

.*(?<=partNumber=)([\w-]+)Output : ac-airoptix-colors-2

this is the regex i have tried but this one is working for first link. how do i put a OR condition that take the last number present in the second link