Epson 1500 - Manual (Page 83)

5. Firmly grip the tab on the left side of the imaging cartridge.
Pull the clear seal all the way out with firm, even pressure.
6. Hold the cartridge and gently shake it front to back.
7. Insert the cartridge by placing the pins on each side of the
cartridge into the grooves inside the printer. Slide it gently
into the opening until it stops. Leave the cover open.
Troubleshooting 3-31