Could anyone provide me with detailed instructions on how to remove the left(red) battery terminal.. specifically (for lack of a better term) thinger with the nut on top???? it appears to be some type of lock mechanism.. i really dont know what it is.. but i dont know how to remove it.. cause there is a nut on the bottom that i cant get to.... yea i might be retarded but.. help

 

nothing?!?!? im trying to connect a 4 gauge wire to the battery terminal to my amp in the trunk...