In the Sam Raimi-directed film Spider-Man 2, Doctor Octavius creates his iconic harness of mechanical tentacles for the purpose of manipulating and controlling his fusion experiment.
In addition to the claws, we see that they contain auxiliary devices/gadgets, a few of which we can clearly see the purpose and use for, such as cameras (which we see later in the film give him a greater sense of his environment), and a smaller set of claws that he uses to handle smaller items (such as the tritium that he used as the fuel source of his experiment).
In addition to these, we also see a couple other devices that he uses during his fights with Spider-Man. He has a set of daggers that can extend from the claws that we see him try to use at least twice against Spider-Man as weapons, and we also see him utilize some sort of smaller tentacle extention that he uses to bind people that he abducts (such as when he took Aunt May and Mary Jane as hostages).
I don't recall any moments during the film that indicate that these particular devices were added after the initial experiment. Given the manipulative nature of the tentacles' AI, it seems unlikely to me that they would be open to any changes, especially if adding any upgrades would have required them to be placed in a potentially vulnerable state (as Octavius initially had a notoriously-hostile attitude towards them after he regained consciousness). As a result, while I could be wrong, based on the available evidence I can only assume that these features were a part of the harness the entire time; and I haven't been able to find any sources that specify their originally-intended purpose(s). Many sources make no mention of them at all; and at best, they get barely more than a passing mention.
Did these auxiliary devices have any potential use for his experiments that we didn't see on film?