i mean its a solid piece of metal going into a amps input that is metal seems like it would slip out fairly easily
and on ebay u can get them for about 4 bucks a piece dont know if you can find them cheaper or not
you could do another method, using ring terminals have your 1/0 with a ring terminal on the end have a short piece of 4 guage with a ring terminal on one end connect it with a bolt and nut and put the other end of the 4 guage into the amp