Well there are four parts to change on Coordinates modifier to make it B instead of A, honestly I suggest changing RTWE to be L+R+Dpad, with no A button, since that just requires editing the first line

if you wanna do that, the first line of RTWE would change to 94000130 FCFF0000

if you want coordinates modifier, wait for someone who isn't lazy like me and wants to show you the code with B instead of A