melted battery and hot wires

[n2mudn]

i have a 2004 ezgo txt pds 36 volt. i bought it about 2 mths ago. the guy i bought it from said he put 6 new trojan batteries in it. just today it stopped running. so i checked it ou.t i found the lead coming from the control box had melted the negative post of the first battery. so i went out and bought a new battery. before i took it for a run after replacing the melted battery i checked out this forum and many more. the better part of the info i found was all leading to a bad connection. i removed all of the battery lead wired. cleaned them and reinstalled them using dielectric grease. took for a run afterwards and noticed both wires coming from the control box was very hot. the negative lead more than the positive.