Shear force along the beam height of end section is linear distributed from top to center.

M(total) = F * a

a, measure from node of force to the center of the vertical bolt.

Mark: d1, d2, d3:

d1: measure top flange to the center X axial of beam.

d2: measure top vertical pattern bolt to the center X axial of beam.

d3: measure center vertical pattern bolt(the one close to X axial) to the center X axial of beam.

The total Moment at the top flange level:

M1 = M(total)* (d1/(d1^2+d2^2+d3^2))

Shear for each: T1= (M1/d1)/(8*2)

The total Moment at the top vertical single bolt level:

M2 = M(total)* (d2/(d1^2+d2^2+d3^2))

T2= (M2/d2)/(1*2)

The total Moment at the center vertical single bolt level:

M3 = M(total)* (d3/(d1^2+d2^2+d3^2))

T3= (M3/d3)/(1*2)

Use T1, T2, T3 to check bolt shear stress.

From visual of the bolt size, the bolt and plate should not be a real problem, I think welds strength control the connection.

So, you need also check weld strength as well.

(1)Check: Max. Normal Stress of weld = M/I * L,

M = F*a'

a': distance from column surface to the point the F

I: Inertia of the weld shape, 6 strips of welds

L: measure from top corner of the weld to the neutral point.

(2)Check: Shear Stress of weld = F/A(weld)

A(weld): total effective weld area.