I have had the same connector melting problem with my zeusminer Thunder x3's But only when i overclock.
Right now i'm using with 8awg car audio amplifier wiring going from the boards to a pair of car battery terminals that i have all the power supply outputs dumped to.
Its not pretty, but its cheap and it works.
The EVGA 1300 PSU is kindof a tight fit in a zeusminer, wires get pretty close to the fan. they grazed the fan on a few occasions I had to zip tie em away and I'm still not comfortable with it, i switched the direction of the fans so i wouldn't worry about the fans sucking the wires into them. Did you have any problems with that?
If you dont mind my asking,
How did you get that cointerrra power supply to fit so nicely? Can you post more pics of that? Does it overclock well? whats the ceiling on clock speed with that PSU
Ugly, cheap and effective is good in my book. Go Pragmatism.
For fitting the PSU, that's really easy. I didn't fit it in xD. The psu is resting next to the Zeus, so that void any stuffing and cramming issues one might have. The stock cables from EVGA are very much quite long, and so i have a lot of range to where i can put the psu. On top, sides, behind, etc. Prior to changing the cable, i had terminal melting at "stock speed" 328mhz after about 1 year of use.
The server PSU are rated 1100 so i could push them if i wanted, but the fan produce a high pitch noise and is unbearable when the load is too high. At the moment i found the lowest freq that doesnt generate HW, i litterally went from non stop HW at 275mhz to 276mhz which i get 0 HW (well, beyond the regular 6-7%~ rareish HW that you get overall). I lose 4mh over it and it think its a good sacrifice. The PSU go down to 820watt usage with 94% eff~. At which there is a high pitch noise but the dB is low enough that my ear stops bleeding.
And it doesnt really fit in in lenght, but for thermal dissipation i still slided in it in the middle, there's some holes in the bottom of the asic, i ran some long tie wrap to hold it in position, put some foam underneath it to point the exhaust at the middle fan, so the heat it generates is expelled outside directly. Added some tape because nothing is complete without ducttape. That way it doesnt budge as much.
And thats it...
Eventually i'm going to sell and get rid of all of this, because i am going to evolve my mini farm into something mostly quiet. I might keep the PSU, as if they are run under optimal load (or anything under 700watt) i can't really hear them. We'll see as the Thunder X3 obviously blow over the noise of everything else.
