Here is the link to the Master Timetable:
LINK
Search for your course. If the course is provided in both terms, there will be two listings of the same course with one saying 1D for first term, and 2D for second term. Then click on the course name or code under the Course Offering section. A window will pop up with all the times and sections during that semester. Check to see if there are more than one set of times for your core classes. C01 is the default core class. If there are multiple classes they would be listed as C02 and so on. Then check to see if there are multiple labs and tutorials by checking for L01, L02, T01, T02, etc. Usually you only need to take one lab and one tutorial so if there are more than one of each type, you can choose either of them if they are available on SOLAR.
Finally, go onto SOLAR and if there are multiple classes or labs or tutorials, you have the option when you chose the course to choose a specific core, lab, or tutorial. If you just added the course and you didn't need to pick a specific C01, L01 or T01 then there are no other times.