[SOLVED] I don't know what my PSU is

[Dimpayy]

I tried opening both of my side panels but I can't see it. I know that it is located on the bottom left corner but I can't see the sticker because of the case. My case is Coolermaster MB600L.
I need to know the wattage & brand. Like is there an app that detects the specs including the power supply? Thanks.
Edit: It is hidden in a tunnel so that's why I can't see the power supply.

 

[Solidjake]

Take the panels off the case, unscrew the PSU from the back and slide it out to see each panel.

 

[Ralston18]

To help you with @Solidjake's suggestion:

https://techgage.com/article/a-quick-look-at-cooler-masters-50-masterbox-mb600l-mid-tower-chassis/

See the third photo up from the bottom of the article.