Below is the Batch Job I have created. I am a litle fuzzy as to how to implement this in the shceduler. Can someone assist?

global class UpdateContactFlags implements Schedulable, Database.Batchable<sObject>{
	public string query = 'SELECT Id, Contact.Id, Campaign.Fund_s__c, Campaign.Listing_Tactic__c, Status from CampaignMember';
		
	global Database.Querylocator start(Database.BatchableContext BC)
	{
		
		return Database.getQueryLocator(query);
	}
	
	global void execute(SchedulableContext SC)
	{
		UpdateContactFlags ucfg = new UpdateContactFlags();
		database.executebatch(ucfg, 100);
	}
	
	global void execute(Database.BatchableContext BC, List<sObject> scope)
	{
	Set<id> liContIds = new Set<id>();

	for(sObject s : scope){
		CampaignMember cm = (CampaignMember)s;

		if(cm.Campaign.Fund_s__c == 'FSIC' && cm.Campaign.IsActive == TRUE && cm.Campaign.Listing_Tactic__c == 'Major Market Roadshow')
			liContIds.add(cm.Contact.Id);
		}

	//query all the contact in a single query
	List<Contact> cont = new List<Contact>();
	
	cont = [select id, Major_Market_Roadshows_Green__c from Contact where id in :liContIds and FSIC_Approved__c != NULL];
	
	for ( Contact conts : cont)
	{
		conts.Major_Market_Roadshows_Green__c = 'Y' ; 
	}

	if(cont.size() > 0)
	
	update cont;
	}
	
	global void finish(Database.BatchableContext BC){} 	
}

 Not really sure what I am missing.

Thank you in advance for the help.