SharePoint Search 2016

I have document libraries at each site collection level in SP2010 and we are migrating each site collection one by one to SP2016 .

Now i’m building search in SP2016. we migrated our first Site Collection ,my question is can we get documents from SP2010 when I Search in SP2016,is there a way where we can link SP2010 repository to SP2016 Search?

I will search in Sp2016 i need to get documents from Sp2016 (which are migrated) and Sp2010(which are not migrated)