u/synthetic-heat-waves

As the title says I'm trying to figure out how to get the head for a w'adrhŭn slingers standard bearer to work. I doubt that it's updated instructions/outdated sprues, but it could be a possibility since its a [atleast in my possession] 3 year old box. it being the first blood w'adrhŭn vs. old dominion starter box

the connecting space on both sides [pictured] dont actually match up, so im unsure of how they're supposed to attach. if anyone could help I would be so incredibly grateful!!