seeing in the second photo you must place where the l B + is seen (positive and in B- the negative of your lenovo charger ... if you have a tester it tests voltage in the charger to identify the positive and the negative of it ... It must also be a red (positive) and a black (negative) cable --- if you still have the chip (that is, you didn't cut the chip) the positive is the inside one and the negative one is the outside one !!! comment !!! greetings !!!