How to match spans near the beginning of a field

[Kev86]

I have this query and want a span first in SearchField. So that ES shows the string that match closest to the beginning of the field first:

{
    "query": {
        "bool": {
            "should": [
                {
                    "match": {
                        "FullName": {
                            "query": "101"
                        }
                    }
                },
                {
                    "bool": {
                        "must": [
                            {
                                "match": {
                                    "SearchField": {
                                        "minimum_should_match": "100%",
                                        "query": "101"
                                    }
                                }
                            },
                            {
                                "match": {
                                    "__deleted": {
                                        "query": "false"
                                    }
                                }
                            }
                        ]
                    }
                }
            ]
        }
    }
}

I tried by adding span_first but it didn't return the same result. Got less hits.

"bool": {
                        "must": [
                            {
                                "span_first": {
                                    "end": 1,
                                    "match": {
                                        "span_term": {
                                            "SearchField": {
                                                "value": "101"
                                            }
                                        }
                                    }
                                }
                            },
                            {
                                "match": {
                                    "__deleted": {
                                        "query": "false"
                                    }
                                }
                            }
                        ]
                    }

Any idea how to query it?