Non-attached MEPs include French National Front veteran Jean-Marie Le Pen, who has been an MEP since 1984, and his daughter Marine Le Pen, vice-president of the National Front.

The ranks of MEPs belonging to no group swelled when the far-right Identity, Tradition and Sovereignty (ITS) bloc disbanded in November 2007, after a row between its Italian and Romanian members over race.

To form a political group in the parliament - and to claim the funding and committee posts that go with that status - it is necessary to have 25 members from at least seven of the 27 member states.

It would be interesting to see a more detailed breakdown, but this, plus the position of the right in European politics, suggests most of them would end up on the right. The European Right tends towards nationalistic positions that are unique to each country's history, while the Left is naturally international.

For example, the Swedish Pirate Party is an "other", but will likely ally with the Green block.

It’s also worth noting that, while “the right” were the big winners in these elections, “the right” is even less a coherent entity in EU politics than it is in the United States at the moment

And that's saying something.
I suppose rather than a support of the right, it's a rejection of the left we are seeing.

Judging by the pie chart it looks like social democrats won relative to socialists and Greens and the European Right (which doesn't have a close equivalent here in the U. S.) is still pretty marginalized.