Rhys doesn't know what he's expecting but its not a beam of light going into his arm. He'd thought there would be some mechanical connection between 9S and himself. A beam of light isn't so bad. It tickles maybe a little but it doesn't hurt and it doesn't look weird either.

So, he just waits and watches, trying to see if he can feel the hacking happening. There'd been some attempts back home but nothing successful. Those had also been involuntarily and Rhys had fought but he's doing his best to let this happen.

Hopefully, Jack doesn't fuck things up and act like a big baby. Maybe he'll even like it, having a friend for the moment.