For nano B01, csi2 <-> csiE?

for nano B01, csi2 <-> csiE ?
But I can see the pdf. csi2<->csiC, csi4<->csiE, which one is correct?

Hi,

CSI4 <-> CSI_C & CSI_D

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OMG!
I have saw this picture!I thought csic+d <-> csi2+3