Fence post spike adapter

Made adapter to fit a spike into a fence post. The first photo shows what I'm replacing. The second the 2 printed parts, the 3rd the parts in position on the spike and the 4th shows the final product installed.

In case you're wondering ... the spike is part of a device that is a motion detector combined with a water sprinkler. I use it to keep the blackbirds away from my pool because otherwise they deposit their babie's droppings quite insistently in the pool.

I've seen similar spikes