Often doesn’t always work that way though! That’s the reality. Plenty of parents with awkward shift patterns are accommodated by courts to the detriment or disadvantage of the resident parent, especially where their work pattern has been constant.
Hence it isn’t clear cut. Ideally he should be responsible for the wraparound care for his contact time. But it isn’t always how courts see it. Especially if the resident parent currently has the capacity to accommodate this as she’s not employed full time.