I just did this a couple of days ago for my third character. All 3 times I've done it on elite, but have been told you can do it on normal as well. You are walking into the IMR until it kills you right?
You can do it on either difficulty.
You have to walk in and die before the device is set to detonate.
If you get the accolade, you then have to head to Battle Group Omega to actually get the boff (though I have been able to get the quest remotely).
edit: Either Isolinear Molecular Reconverter can work for this.
I( usually ask, if we have enough time for the optional or have already lost the timer, if anyone needs the accolade before blowing it.
Took me two tries to get this one. My partner tried to get it last time we ran KA and it didn't work. Seems odd, maybe you have to get 'deep' into the IMR for it to trigger?
Yes, you have to die inside the chamber. Than you get an accolade calles "Assimilated" (Note: There are two accolades with the same name). After you got the accolade you can pick up your Borg at Omega Fleet by calling Four of Ten. It is a ver yrare Science BO. He is very usefull for ground missions because he has the skill "nanite health monitor" which helps against assimilation.
there is some kind of bug, that when u log out the game if u not claim the candidate at the battlegroup u bug ur self and never get the call of hail from 4 of 10. even if u just get the acolade asimilated.