Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
What version of MAC OS X is on your computers? is the first question to ask.
Can you connect by wireless? or do your computers lack wireless capability?
If they lack wireless capability, it can be added to them with a small USB adapter. Ask me for specifics, if you are interested.
If they have wireless capability, then what is preventing you from connecting them to the wireless router?
Do you need the procedure for wireless connecting? if so, please let me know the MAC OS X version on the computer(s) involved, and I will provide instructions.
If you have the procedure, but need details, or have reached the point of not being able to make the procedure work, let me know what point that is, and I will help you past the problem.