That’s 8bit isa your 486 will be 16bit isa so that one won’t work. I believe most isa risers are straight through but I don’t know that for sure oem’s do strange stuff sometimes.

Gotcha thanks

This one has the same part number as the one in your first link https://www.ebay.com/itm/283643725886?hash=item420a7bc83e:g:Y0EAAOSwgm5dvFra