No, you would not have to do any additional work in order to install the Tekonsha T-one # TK29VR on your 2023 Mitsubishi Eclipse Cross. You simply plug in the harness, insert the included in-line fuse, connect the ground wire to good clean metal and you are all set. There are no additional parts needed. It really is quite easy. I have linked the instruction manual below if you want to take a closer look. view full answer...