Awesome, thanks for your help! I would want to add a fuse just in case of an error that I am sure I would make at some point, I am also getting a watt meter to monitor the board readings. Just checking, do I put the watt meter between the batteries and ESC correct? Also the fuse would go there too? I saw a chart someone put up of their fuse between the esc and motor but it seemed strange to me, maybe some people put them in both spots. I am buying 4 5000mAh 3S1P 20C batteries and am running them as 2 5000mAh 6S batteries. Since each battery can get a cont 100A and burst 150A I am wondering what this would mean for the VESC because it can do a cont 50A and a burst of 240A. When programming the VESC are their options to not draw as much power as the batteries can give? Also I dont really know of any good fuses for VESC's so if you know of any feel free to share, I am still looking around for some.
The battery C rating is almost always exagerrated, if You can get something higher rated, it will last longer. Also take the advantage that VESC gives, go with higher voltage (like 12S), lower ampacity, it's a little bit more efficient, no need to use super-thick wires. Yep, put the wattmeter and fuse between battery and ESC (any car fuse rated for the ampacity a little bit above planned in Your circuit will be fine). You can limit VESC amp draw when programming it, but it probably never will go any near standard 50A setting.