Aerium

I had some mishaps replacing the battery cables from the previous owners horrible wiring. I think I have it wired up right but it won’t start. When I turn the key, the electronics turn on, radio and lights work and all. It just won’t turn over at all. I tried jumping it to no avail. I’m thinking it’s the starter cable but I have no experience or knowledge on the starter and all that. This is really my first time dealing with the electrical components on the Jeep.