How can I extract the first (or nth) value from a connector linked field?

Beaver Themer
Pods Themer addon
Multi-value image custom field defined in Pods (i.e. “extra_images”)
BB Gallery Module defined with image connector set to custom field “extra_images”

How can I specify on the connector custom field definition to only grab the first xx number of images. For example, the field might have 20 images but I only want the first 5 to be shown in the gallery.