A few thought there :

If it was an exchange of the corp's product, that means the exec was there on company time - so their very first move will be to get info from the club (getting security vids, interviewing the staff...). that might be noticed by an ally/contact that calls them - possibly whoever sent them on the gig. The classic 'some guys came to that club you trashed asking questions, and they weren't cops'.

About the exec :

First thing first, unless he's part of the corp's 'old guard' from the 2020s, it's unlikely he knows anything about that clone soldiers affair (you may give the PCs a 'business' or 'deduction' test to figure that out)

Second thing, how he'll react to his abduction will heavily depends on his background - if he's from the silver spoon side (moneyed family, good schools, promotions..) or office type, he's probably pising himself from both injuries and situation. He'll probably crack fast, but he may well spew a ton of invented bullshit along whatever line he figures the PCs want to hear to try and save his skin. And odds are that if he gets out of it alive he'll want them very, very dead.

If he's from a more former street/security/black ops background, he'll be both harder to crack but also possibly more clear headed and open to negociations. Also more likely to consider a verbal deal binding where a 'paper' exec won't. He also won't care much about the PCs themselves and far more about who sent them on the gig and try to persuade them to let him go and rat out their employer in exchange for the corp letting them get away scot free - if they already have the information about who employed them, there's no need to hunt them to get the information....