Bolts needed to attach Wakeboard racks to FCT4

[TexasNaut]

Anyone know the sizes bolts / screws needed to attach spinner wakeboard racks to tower FCT4.
4 on each side and square connector. All nautique parts 2010 226

Nautique parts and Roswell were no help.

[TexasNaut]

Found it:

For future reference 1/4- 20 x 2 1/2 Socket Cap Screw (Stainless)