[giomasce]

Is "register" instead of "resistor" just a typo, or is that word really used in this context?

[tecleandor]

I think it's a typo from japanese. I think 'register' and 'resistor' can be written the same or very similar in katakana ( レジスター ) and it can be confusing.

So it's resistor.

[magicalhippo]

It's a typo, you can clearly see the three resistors in the image as well.