use comp in you office there should be option to buy bat and as bonus you can go to FIGHT folder and decrese animatronic skeletons HP to 1 so you can beat them faster
i think the middle one is one you need to click on to start fight
by the way tip for hunting exoskeletons is quite easy: just go to folder FIGHT and set animatronic skeleton HP to 1 meaning ANY damage you deal will kill it instantaneously thus you can easily farm scrap for upgrades and parts
a friendly trick to all nice people here: did you know you can decreased animatronic health ? just open folder FIGHT and set animatronic skeleton HP to 1 meaning ANY damage you deal will kill it instantaneously thus you can easily farm scrap for upgrades and parts