Need some help and ideas

[Eroglik1]

Hello i am new on here. I have a 2007 yaris sedan automatic. I have been having problems with it starting. It seems to only start when it wants. I have new battery and alternator was just tested. When it doesnt start it just clicks. I usually have to jiggle wires connected behind the pos terminal of the battery.then it starts. Sometimes it starts just fine. It doesnt start i would say about 1 in 10 times. Also one of my belts squeaks real loud when started. I had the serpentine belt replaced already. I jave remote start. When i ise the remote start in the morning the car starts squeaks then shuts off. Then it starts again by itself and squeaks then shuts off. Then starts again this time no squeak and stays on. What could any of this be? Any help or suggestions would be greatly apppreciated