Where do I pour the transmission fluid into?

Tristan Allen, the transmission has two plug bolts. One on the bottom and one on the side of the transmission. Remove the top bolt first, then the bottom one to let air vent through the trans while you drain the fluid. Always clean the threads on the plug bolts as well as the ones on the transmission housing. Once fully drained, reinstall the bottom plug bolt. Now you will need some kind of fluid pump to add transmission fluid to the side hole. You will know that it is filled when the transmission fluid comes out of the side hole. Reinstall the plug bolt. If you need to identify the bolts, post some images of your transmission with your question. For that use this guide