If that's the case, then it appears that agrees with CH1. The contacts are listed in 4123 order in the manual so it appears that is the position for CH1.
Barry - N4BUQ
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The one in the manual has 4 switch contacts because the first one is the power
contact that is omitted in the mode select section. The first contact appears
in the powersupply section. Ignore the 1st contact in the physical image. The
last 4 are the ones shown in the manual.