Where is the tectum located?

Good day, esteemed financial professional. I'm curious about a topic that seems to bridge the gap between neuroscience and finance, albeit in a rather unconventional manner. Could you perhaps enlighten me on the location of the tectum? I've heard it mentioned in some discussions regarding decision-making processes and their potential LINK to financial investments, yet I'm unclear about its anatomical placement. Your expertise in this domain would be greatly appreciated in clarifying this matter.