Wiring – Transformer going into receptacle obstructed by board behind it

I am in the process of upgrading my doorbell transformer. (I am the fella from yesterday with the question about broken off back stabbed wires, registered with a proper account this time)

In addition to upgrading the transformer I am now changing out the receptacle. Removed the existing receptacle, tried putting the new transformer in and ran into a minor speed bump. The utility box that holds the receptacle is to the bottom right of my panel mounted on particle board. The new transformer secures itself via. threaded clamp going into a hole on the box. The threading on the new transformer can't really get into the hole entirely or straight due to the edge of the particle board blocking it. Here's a photo:

I have been thinking about what my options are. What I have thought of so far:

1. Keep it as is. It's not pretty but I wound the clamp through a couple thread rotations to the point where it feels secure enough.
2. Move the box right to the edge of the particle board so there is no obstruction.
3. Find a place to screw the transformer right onto the particle board, or add some board next to the particle board and screw the transformer on there if there is no room in current setup.
4. Purchase a different transformer that has the same screw in style as the old one.
5. Completely overhaul and move where my transformer is hooked up.

Option 1 is obviously the laziest but if it's safe would probably be preferred. 2 and 3 are happy mediums and then 4 and 5 are last resorts. At this point I suppose I am looking to get opinions and/or suggestions in case I have missed anything. The other thing is there was another ground wire I had not noticed screwed to the box against the particle board. My plan was to remove that, pigtail the grounds and connect them to the ground screw of the receptacle assuming that is OK? Anyways sorry for the drawn out post and question. First home and have only owned for a couple months, so I am finding a lot of surprises.