?i Do Not Know Where To Oil My Diatom Filter?

[BonesNTX]

I need to oil my 1 year old filter and I don't know where to lube it.

Could someone please tell me where to oil and even better a pic or a link to a pic?

I have the manual which doesn't address this and the sticker on the motor has no arrow pointing to a hole. (there are of course alot of holes to choose from)

Thank you