Please note that the practices for outreach for veterans (vets) and individuals with disabilities (IWDs) are slightly more aggressive in a sense. Companies are required to determine how current methods are working and then essentially re-evaluate connections to find more sources of these groups. The new Part 60-741.44(f)(3) requires that the contractor evaluate and "If the contractor concludes the totality of its efforts were not effective in identifying and recruiting qualified individuals with disabilities, it shall identify and implement alternative efforts listed in paragraphs (f)(1) or (f)(2) of this section in order to fulfill its obligations." Part 60-300.44(f) covering veterans has similar language. To answer your question as best I can, there must be some kind of action also embedded for recruitment of these two groups. The best practice is to engage face to face and establish relationships. Document dates, times, names, etc. There are some groups listed on the OFCCP website where you can start. If there are military installations from where you can recruit, that may be a good source. Local employment service centers also typically have a vet representative. Your employees may be a part of groups from which to recruit.
You can use this OFCCP audit checklist to ensure you're doing what is required to maintain OFCCP's regulations including VEVRAA, Section 503, and EO 11246. Or request a demo to streamline your compliance and recruiting efforts.