CSF Fields - Where do I find them in REST

Hi

Looking for

CSFAU_VendBank_BPayBillerCode
CSFAU_VendBank_BPayRefNo
CSFAU_VendBank_BPayProp

which according to Trace are on (should be) on VendBank but I can’t see them or get access to them via REST.

How I acccess CSF fields via REST?

Cheers