SAE Kit Terminals
These terminals are used by default from the factory on PC2150T, PC2150MJT.
The standard production process for the PC2150 actually starts with Studs and these terminal adaptors are added to make a PC2150S (Studs) into a PC2150T (Terminals).
You can, therefore, remove the terminals if you wanted to use eyelets and bolts on a PC2150T. You are essentially reverting the battery back to a PC2150S.