Dawgma

It has a cylinder look with a blue plug into it with brown,yellow,red,blue wires coming out? Neighbor took my moms car apart and got in over his head ,we need help figure out where this piece goes and the manual he has does not show this? It goes somewhere on the right side under dash or? I'm just trying to reach out to anyone who may know...it's been 6 weeks:( Thank you in advance to any in put or assistance,we sure could use it and would appreciate it. Best Regards, Cheri