Hello Tingari,
Firstly I would like to say Careers 360 is the right place you have come to for answers.

Now, Management Quota is the percentage of seats reserved by an institution to alot through their own means and rules. Management Quota is beneficial for those who can reserve admission through higher amounts of tuition fees or what ever may be included in the payment receipt. Management Quota usually sticks around a higher amount and that varies and depends on individual colleges and various candidates. For example, Foreign students may have to pay more through management quota, so do Non-Domicile students.

I would suggest you to speak to the authorities of the various institutions you have mentioned in the query and they will be  able to guide you to the individual who will assist you with the fee structure through Management Quota. This will be beneficial as they might consider your case, which is that the score is closer to the cutoff and hence, might turn luck to your favour.

All the best!