EVision Bench Test

I wired together my EVision and tested it out. You can see the brains on the left, the current metering shunt in the top middle, the display in the middle right & the user interface (with the bright red light) at the bottom right. The only user interface is a rotating pushing knob, I guess to reduce driver distraction as you have only one item to reach for. This battery pack isn't designed for high current use, so it's interconnects are quite thin compared to the big cable in the middle which will be used on the car.

You can see a mid-pack fuse at the bottom middle, but what is missing are fuses for the high voltage wiring to the EVision. Is my best option something like this with a short pigtail to the batteries? That does assume you can get a 500mA 50mA 400V DC fuse in the 3AG size (I can't find one right now). If not, is there anything better than a larger inline fuse holder?