Hi there. 

The MHCET counseling will be held online . You will have to log in in your account on the Mhcet DTE website. When they publish the option for filling the CAP rounds forms . You must fill all the details and select the colleges you want by the preference number of your wish . 

There will be 3 cap rounds . 

The CAP Rounds starts from june and ends in AUGUST. The colleges commences from August generally. So you must visit the DTE Site first.

Hope this was helpful