Anyone knows what each slot is for which labeled here in picture as 5,1 & 2,3.

Need answer asap, thanks. gen 5th also share similar fusebox hxxps://www.autogenius.info/honda-prelude-1997-2001-fuse-box-diagram/

nothing came up when googled: 1992-96 honda prelude passenger compartment fuse box

 

They are for wiring in additional accessories. They are not all the same and are live at different times depending on the position of the ignition switch. If you intend to use them to add an accessory, use a test light or multimeter to confirm their suitability for the accessory power requirements.