I made up a set from 10ga silicone jacketed wire. There is a pigtail coming directly off the battery and connects with 40 amp Sermos connectors. When I don't need the jumper cables the pigtail powers my auxillary fuse block. All parts came from McMaster Carr
. The silicone jacket is good in case you overheat them, it will not melt.
It's a good idea to solder the connection to the clips instead of depending on the cheesy crimp that will promote high resitance in the connection.
I've jumped by buddies R80G/S a number of times from complete dead with no problems.