Promotes double-strand break (DSB) end-joining and facilitates programmed recombination by controlling how DNA ends are joined in a spatially oriented manner during repair (By similarity). Also plays a role in DNA repair by restricting DNA end resection in double strand break (DSB) repair (PubMed:24507776, PubMed:37014751). Facilitates replication of complex DNA regions and regulates the maintenance of chromatin structure (PubMed:37014751). {ECO:0000250|UniProtKB:Q9JIM3, ECO:0000269|PubMed:24507776, ECO:0000269|PubMed:37014751}. This is the function of ERCC6L2 (ERCC excision repair 6 like 2, Ensembl gene identifier ENSG00000182150).