'Where like' clause using the concatenated value of 2 columns with eloquent

I have a query that searches for a term in several columns and one of them has to be a full name.

I have separated the full name in name and lastname, so I have to concat these 2 values when searching.

I have this right now only searching for name. How I would add the concat to lastname? I was investigating over mutators but I don't know if it is the way to way.

public function search($searchQuery)
{
    $search = "%{$searchQuery}%";

    return Order::with('customer')
                    ->orWhereHas('customer', function($query) use ($search){
                        $query->where('dni', 'like', $search);
                    })
                    ->orWhereHas('customer', function($query) use ($search){
                        $query->where('name', 'like', $search);
                    })
                    ->orWhere('code', 'like', $search)
                    ->paginate(15);
}

via Chebli Mohamed