positive battery cable replaceable?

I'm dealing with an ongoing issue with the positive battery cable that to runs down to the starter being too short. And after swapping to a Dakota starter, it forced my hand, and I had to do a sketchy splice to lengthen it temporarily to get it moving under its own power again.

Now for the question, is there any reason I can't go to let's say Walmart and buy a long generic replacement negative battery cable and use it as a positive wire replacing the existing one in there now? Like is there any differences aside from color? Im fine with crimping different connectors on the ends. I don't have the money to throw down on a 100$+ direct replacement cable unfortunately.