Glad you got it sorted with no rectal trauma.Response from MGW that explains what they are:
THE BRACKET THAT YOU MOUNTED IN THE REAR OF THE SHIFTER THAT THE 2
STAINLESS PINS RIDE INTO HAS THE STANDARD FIRMER BUSHINGS. SOME PEOPLE
PREFER A BIT SOFTER SETTING MORE LIKE THE OEM SHIFTER ( WHY I HAVE NO
IDEA!! LOL ) *SO YOU CAN SWAP THEM OUT IF YOU LIKE.