The R88A-CRKM010SR-E: This cable mates the encoder or resolver on the motor back to the drive. Category is Encoders, subcategory Encorder & Resolver Cables — exactly what you'd expect for a Omron Σ-series or G-series servo setup.
No last-time-buy clock ticking. Quote it against your BOM line; I'll have the supply posture for you on the RFQ.