As you'd expect from HAT, the figures are lovely (though I think thi photo may be upside down) and are provided with separate packs. I didn't see that they were going to stay attached for long with just a dab of PVA so some thought was called for.
Here I have assembled the components of my masterplan. An unsuspecting Russian Musketeer - let's call him Little Ivan, his pack, pliers and a pin!
Using the pliers I shoved the pin into Little Ivan's back.
Ouch!
The pliers were used again to clip the pin so that only about 5mm remained visible.
A dab of PVA was applied and the pack shoved into place.
Little Ivan joins his friends while they wait for the PVA tp dry.