Video outputs question

[Gogu]

If I have a monitor connected through SDI and another through the composite is there a way to make both outputs online at the same time ?

I have an Ikan V8000. Is there a way to combine the 3 component cables into a single one so I can make a longer SDI (instead of 3) and use it as a video assist ? If I connect it through the composite I will have the above problem as the EX1 cannot output both SD and HD signals at the same time .

Thanks!