The System Admin can use the following Lead features for Intelligent Need-Based Referrals:
Lead Routing, which is a feature that allows users to distribute leads to the right users or queues based on criteria such as lead source, industry, or product interest.
Lead Assignment Rules, which are rules that specify how to assign leads to users or queues when they are created manually, captured from the web, or imported via Data Import Wizard.
Einstein Lead Scoring, which is a feature that uses artificial intelligence to analyze historical data and predict how likely a lead is to convert. Einstein Lead Scoring assigns a score and an insight to each lead, which can help users prioritize and follow up on the most promising leads.

Explanation
To configure a custom field for reporting when relating two business accounts to each other, the administrator should configure the custom field on the Account-Account Relationship object. The Account-Account Relationship object is a custom object in Financial Services Cloud that allows you to create and manage relationships between two accounts, such as Household Member, Business Owner, Trustee, or Friend. You can use the Account-Account Relationship object to store additional information about the relationship between two accounts, such as role, start date, end date, or status. You can also use the Account-Account Relationship object to report on the account-account relationships and analyze their impact on your business. Verified References: : Salesforce Help Article [4] : Salesforce Help Article [5]

The following out of the box capabilities come with Financial Services Cloud Lead & Referral Management:
Referral Conversion: This capability allows you toconvert a referral to an opportunity, a contact, or an account. You can use this capability to track the progress and outcome of a referral and measure its impact on your business.
Assigning a Referral: This capability allows you to assign a referral to another user, queue, or line of business.
You can use this capability to route a referral to the appropriate person or team who can best meet the customer's need or interest.
Accepting a Referral: This capability allows you to accept a referral that is assigned to you or your queue.
You can use this capability to acknowledge that you have received a referral and are ready to work on it.
Verified References: : Salesforce Help Article 1 : Salesforce Help Article 3 : Salesforce Help Article 5