Adjointenes of unknown functors

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I would like to understand what are here on the page $266$ the types of items in the adjoint euqation $$\mu^{Lim}_{\cal K}\vdash Lim\ \eta_{\cal K}^{Lim}.$$ They should be functors by the definition of $\vdash.$ From where to where they lead and how do they act ?