1. go to second frame and right click the frame's border.
2. from popup menu select "Add Sequence Local"
3. connect your variable with the "yellow square" created in previous step
4. go to third frame where you can see a "yellow square containing an arrow pointing in" attached to border in the same place. This is your "global variable" - the value coming from second frame.
5. connect this one as you need
Another solution is to create local variables for those parameters, but is recommended to avoid them if possible.
Hope this helps