McCord: Hey, just because people eat the burger, doesn't mean they wanna know the cow.
Lincoln Six Echo: My name is Lincoln Six Echo and I'm your insurance policy.
Tom Lincoln: Yes, can you please explain to me why my insurance policy is sitting downstairs on my fucking sofa?!
McCord: All right, look. I know you're new to this whole human experience and all, but there's one universal truth, and that is you never give a woman your credit card.
Chosen answer: It appears to be some sort of cable - it can be seen leading to the bracelet in the shot from above the bed immediately prior to the one where Lincoln unplugs it. Exactly what it does is never revealed, but it seems likely to be some sort of monitoring system, keeping an eye on Lincoln's health through sensors in the bracelet.
Tailkinker ★