Create a Custom Field That Sources Information From Customer's Contact on a Custom Record

1. Edit the Custom Record and Create a New Field for the Customer's Contact List

1. Label: Enter Label (Example: Contact List)
2. Type: Select List/Record
3. List/Record: Select Contact
4. Click Sourcing & Filtering
5. Source List: Select Customer
6. Source Filter By: Select Parent
7. Store Value: Enter Checkmark
8. Click Save
   

2. Create another field, in the Custom Record, to source the Email from the Contact record

1. Label: Enter Label (Example: Contact Email)
2. Type: Select Email Address
3. Click Sourcing & Filtering
4. Source List: Select Contact List 
5. Source From: Select E-mail
6. Store Value: Enter Checkmark
7. Click Save