battery cable colors lenghts rubber boots etc

[ht4spd307]

hello i was looking at purchasing a positive battery cable for my 440 69 charger now i am a bit confused on this subject as vendors selling them vary  in wire colors. all have the thick red and the thin red wire which i'd say is correct  then 1 has brown wires and the other has 2 black wires which one is correct the brown or the black also the lengths seem to be vary and also the boots insulating them are different one is molded together another is separate and the wire lengths are different also

[66FBCharger]

 

[ht4spd307]

oh yeah then there is this one were the ends are attached at the starter end and the lengths are even unlike the over one with brown wires all wires are different lenghts  by the way these are all listed for the same application 440 69 charger