You seem to indicate there is enough room for the markings by stating an option to place markings is on the outside of the platform. When you state “platform”, are you referring to the battery compartment?
Is this the first time a Thomas product has been where the PCBA has been marked and the spring covers the markings? I reviewed some similar Thomas packages that included the battery markings shown in the package example you provided. However, I was unable to see if the product included the same battery markings.