Drawing: RCT001/9 Drawing: SCH-4030-1 Manual: MM18-20 There are Dec_NEG, DEC_POS,HA_NEG,HA_POS,DEC_VER etc. Don't know what this does. There are a variety of mercury switches too. Four normal limits Four Failsafe limits, the +/- of the axes are tied together to save wire Two home near the zenith