I'm not sure about this to be honest, but the usual advice is not to contest a non mol or it can delay child arrangements for a long time. There is an option to do an undertaking instead sometimes. So you undertake not to contact her or go near her, but it can have clauses to say only for collecting or dropping of the child. The other alternative is accepting a non mol on a "no admission" basis. ie you accept the terms of a non mol but there is no finding against you. The difference between an undertaking and "no admission" non mol is the latter has the power of arrest and the former doesn't. If breached.
Do you have a lawyer? It's usually better to use a direct access barrister for hearings and not use a solicitor. Barristers are experts in court and solicitors just run up loads of bills and don't achieve much.
In this situation, if they are both being heard at the same hearing, I think it could be advisable to use a direct access barrister to represent you if you can possibly afford it.
The reasons being - you're more likely to get an undertaking option - a barrister could persuade the Judge. The Barrister may be able to thrash out an agreement for child arrangements for a consent order and then the court process goes no further. If not they are more likely to get you an interim order.
Are you actually separated and are you getting to see your children? It sounds to me like the court can see the non mol application was a reaction to the C100 application.
But you want to avoid things dragging on for two years or more with contested non mols or even a fact finding hearing if the ex makes a lot of allegations. And then it also can get very expensive.
I think using a barrister now might nip things in the bud so it doesn't get protracted and expensive later. I mean it's expensive using a barrister, but FHDRA is a half day hearing. Fact finds can be 3 days!