I think Larry is done with this thread so hopefully ok to hijack it...
I only have 4S and 6S batteries. This is the loom that I use:
Buy BNTECHGO JST XH 2.54 5 Pin Male to Female Connector Plug with Flexible 22 AWG Silicone Wires 30 cm Long Cables 10 Pieces: Connectors & Adapters - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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The key is JST XH is the most common size for the BattGo and HobbyMate and other chargers/monitors. You will want the 8S version of course.
I like ones like this since the wires are long but i've often soldered extensions on and put a ring connector on the end. These are technically extensions but I've cut the female end off almost all of them - they can be used to make a longer set too easily, this is a nice feature.
Hopefully this helps, apologies to Larry619 for the use of his fairway.
Regarding a power supply, i still do not own one. My power supply is the bright thing in the sky which i use with an SCC to charge a battery which acts as my power supply... part of the beauty of having bought more LiFePO4 batteries than a normal person would.
If you happen to have a hefty PC laying around, i'd try using the power supply from that to feed the BattGo. The XT-60 connectors may out at 60amps technically and they get warm around 50 amps so i'm not sure i would recommend a lot more than that.