Quoque is used right after the word it serves to highlight.
So, when we say that the word order is free, it's not 100% true...
Uxores quoque benignae sunt. = it's "Uxores" that is highlighted.
So those boys are kind, but the wives too are kind.
Uxores benignae quoque sunt.
The wives are malicious, but they are also kind people.
Source: http://www.dicolatin.com/FR/LAK/0/QUOQUE/index.htm (in French)