Pulled out iMac drive, stuck into enclosure and want to use as external to rescue data from it. How ?

Hi folks,

so there is a software issue with my iMac fusion drive that will most likely require me to do a full cleanup losing all my data regardless of the partitions.

So I literally took the iMac apart, pulled out the hard drive and stuck it into an external enclosure which can then connect to my MacBook . The problem is, I need to somehow put that drive into the target disk mode , but i cant do it on the actual iMac because it simply won't boot up.

So in short, is there a way to put the hard drive into the target disk mode while it is physically taken out of the iMac and connected via "drawer" and usb to a MacBook simply to try and save as much data as I can from the other partition before we have to wipe the entire hard drive?