I have this printer Epson TM-T88IV M129H with a serial port.

I have a serial to USB adapter.

Output of dmesg | grep tty is:

dmesg | grep tty
[    0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable                                                                                          _headphones=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_hdmi=0  smsc95xx.macaddr=B8:                                                                                          27:EB:BE:50:6D vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000  console=ttyS0,115                                                                                          200 console=tty1 root=PARTUUID=1ee87425-02 rootfstype=ext4 fsck.repair=yes rootwait qui                                                                                          et splash plymouth.ignore-serial-consoles cfg80211.ieee80211_regdom=DE
[    0.001161] printk: console [tty1] enabled
[    4.218072] 20201000.serial: ttyAMA1 at MMIO 0x20201000 (irq = 81, base_baud = 0) is                                                                                           a PL011 rev2
[    4.218850] serial serial0: tty port ttyAMA1 registered
[   25.024961] systemd[1]: Created slice system-getty.slice - Slice /system/getty.
[  122.612464] usb 1-1.2: pl2303 converter now attached to ttyUSB0

I want to install the printer under CUPS. Anyone have an idea how I can do this?
When I use AddPrinter in CUPS the model does not appear in the list.