It appears that no resumptive pronoun is required with 3rd person singular heads; here the transitive marker is sufficient to mark the role of the head in the relative clause.
The two are coming here, the ones that he (a white man) had kept hidden away. (Context: a narrative about the escape of the speaker and her classificatory sister from a station where, as young girls, they were kept for domestic labour - quoting a familiy member when they reached their family living in the hill country.)