I will remove my second SSD from booting sequence (but it will still be connected and I will be using second partition on that disk)
...I want to boot from my second SSD (with cloned partition) on another computer
this doesn't really make sense.
you state that you want to keep the second SSD and use partitions located on it for your current system,
but that you want to use it to boot Windows on another system?
are you planning on just relocating the disk back and forth between systems frequently?
I would like to clone the C partition with Win10 installation to second SSD...
I want to boot from my second SSD (with cloned partition) on another computer with similar hardware.
unless the 2nd system is using the exact same motherboard & CPU, this is probably not the best idea.
and your boot drive has more system partitions than just C:.
for Windows to load and run correctly you would need to clone all of these system partitions arranged with the same disk structure, not just the Windows partition.
so pretty much cloning the entire disk would be required.
you will be much better off just creating a Windows install package and performing a fresh install on the second system.