assembly holes from part to another part -linear pattern generated

Hi Everyone

I want to make steel connection between column and beam, so I used

a- part for the column

b-part for the beam

c-part for the connection or the joint

I am going to make the joint as smart component , but I have an issue here, I created some holes for the bolts connection with the column , I used linear pattern

when I edit the column to transfer these holes I want to convert entities which is the linear pattern , not to choose each one individual, because I could change the number of bolts and then I will get errors

so , please how to convert this linear pattern , and make the sketch in the other part always convert the pattern , what ever it is.

regards

AR

SolidworksAssemblies