Hi Omer
i think i have the answer for ur question but for me is more easy to explain with a video tutorial. I prepare a little one for u, how to link layers in separated sequences. My english is not so good but… i made my best 😉 Anyway hope this answer ur question. And if not let me know and maybe i can help u with another solution.
Regards
Pd: Also using the solution i give u( take a look at the video first), u can create a null object in the main comp and link the 2 layers properties to the properties of this null. Then u can controll both direct in the main comp.