Trump is doing well among conservative Latinos and conservative Black men. The Latinos that vote for Trump are less likely to identify as Latino.
We see this a lot with immigrant groups. They tend to revert to their base ideological leanings over time, rather than their ethnic identity. It is kinda why Republicans shoot themselves in the foot alienating these voters. A lot of them are natural conservative voters on social issues.
Same goes for Black voters. There are a lot of social conservative Black voters. Before the GOP came out against civil rights and desegregation, a decent chunk of them voted for Republicans. Jackie Robinson infamously campaigned for Nixon for example.