How do I install CD's on a laptop that has no interface for CD's?

How do I install CD's on a laptop that has no interface for CD's?

Short answer: Not at all.
Possibly. Can you pull the contents of the DVD / CD onto a USB stick, transfer the data via network / internet or use an external DVD drive (also via USB)?

You can use an external CD / DVD drive or share the CD / DVD drive of another PC / laptop on the LAN and access it over the network.

You can also create an image of the CD and open it with a virtual drive.

With an external cd rom drive. Gibts already for small money as usb device…

or you are looking for someone in the relationship or acquaintance, who has a pc with optical drive and you copy the cd on a usb stick.